My Slide Rules
Table of Contents
In Order of Acquisition
Wish List
All photos ©2023 A. E. Rinehart unless otherwise noted.
Concise Model CTCS-552
Concise Page on
ISRM
This was in a box of stuff Dad said I could have if I was interested
when I was a kid. There were also some James Bond novels and a little
pocket tool set.
I thought the design of the scales was interesting, with the neat
numbers and ticks, and the index indicators on C and D. It seemed clean
and purposeful.
The reference card with all of its conversion factors and tables, the
table of elements, and rulers were powerful tools to my little Star
Trek addled mind.
I played with it like a toy and left it exposed to sunlight in a
window sill. If I remember correctly, the sunlight is what hurt it
worst.
When Dad visited in December 2021, I showed him my collection and
told him I got this Concise from him. He said he didn't remember it. In
fact, he said the slide rule he used was a yellow pocket-size Pickett!
He said he liked Picketts because they were “built like tanks” and did
anyone else even make slide rules? He forgot which model he had,
though.
From Dad, 1976?
Scales: 4in || D ( C, CI, L, A, K) || 10cm
Table of the Elements and Temperature Conversion Chart on back
Insert ©1966
Length, Area, Weight, Volume, Decimal Equivalents, Velocity, Gas
Constants, Flow Rate, Energy, Pressure, Useful Constants
Includes manual
Includes red vinyl case
Imprinted "Sturgis Equipment Company"
Poor condition, but complete and functional. Taped together.
I played with it like a toy and left it exposed to sunlight in a
window sill. If I remember correctly, the sunlight is what hurt it
worst.
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Pickett 902 Simplex Trig
My Concise 552 made me curious about slide rules, so I searched for
more information about them. I found ISRM and some other info about
slide rules. I mentioned all of this to Lys, and she looked on Ebay and
found a lot of two slide rules for $20: this Pickett 902, and the Roos SR-109 below.
Lys got me this!
Lot of two (with Roos SR-109 below) for ~$20
~2010?
Pickett
Metal Slide Rules Chronology Pickett
Metal Slide Rules - A Brief Update Manufactured 1955 - 1957
Aluminum
Shiny edges, not corroded or dark
1953 or Later: Transition from Magnesium to Aluminum occurred in
1953 (?)
“Period 3”
Logo Style 3
Stamped Aluminum Posts
“Smooth Stamped Posts Contoured to Finger Tip”
Plain Flat Lens
Machined Metal Cursor Bars
Grooved Rails
Grooved Slide
Slide Tension Springs
Slide Reverse has “41” artwork mark, no copyright mark.
Scales
Front: K, A [B, T, S, C] D, L
Rear: Instructions
Good condition
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Roos Company No. SR-109
Lys got me this!
Lot of two (with Pickett 902-T above) for ~$20
~2010?
Manufactured 1941 - 1946, probably 1945
Made by The Roos Company prior to Charvoz-Roos merger (1946)
Material: Wood stock with plastic laminate, plastic end pieces
Scales:
Front Scale: T, DF [ CF, CIF, CI, C ] D, S, ST
Back Scale: Conversions [ B, K, L, C ] Trig Identities
Includes "MANNHEIM-TRIG" manual
Manual © 1945
Manual is from Acu-Rule
Fair condition. Plastic on slide delaminating from wood slightly at
ends.
Includes leatherette case
No markings on case
This seems to be the same size and design as the case that came with
the Post 1457 , except with smooth leather
Flap torn off
When I got it, the flap wasn't torn off yet, but it was close
Written inside flap:
"Mrs. J. S. Payte 322 Dennis St. Nacodoches Texas"
Compare to Frederick
Post 1457 Mannheim Trig ISRM S076
Also compare to Frederick Post 1457
below.
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Pickett Model 700 A-2
"U. S. AIR FORCE
AERIAL PHOTO SLIDE RULE TYPE A-2"
Purchased June 12, 2020
Manual
on ISRM
Pickett
Metal Slide Rules Chronology Pickett
Metal Slide Rules - A Brief Update Manufactured Early 1950s
Aluminum
Shiny edges, not corroded or dark
1953 or Later: Transition from Magnesium to Aluminum occurred in
1953 (?)
Documentation states that Aerial Photo Slide Rule is "Front" and
Slide Rule Scales are "Reverse"
Scales:
Front: Ground Size (Feet), Image Size (CM, FT), Focal Length
(Inches), Altitude (Feet)
Rear: L, A DF [ CF, CIF, T, S, C ] D, DI, K
Logo Style 3
Stamped Aluminum Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Grooved Rails
Male Slide
No Slide Tension Springs
Includes Case with Conversions and Formulas and pocket clip
Good condition.
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Pickett Model 520 A-1
"U. S. AIR FORCE
AERIAL PHOTO SLIDE RULE TYPE A-1"
Purchased June 25, 2020
Manual
on ISRM Pickett
Metal Slide Rules Chronology Pickett
Metal Slide Rules - A Brief Update Manufactured 1962 - 1966
Aluminum
Shiny edges, not corroded or dark
Documentation states that Aerial Photo Slide Rule is "Front" and
Slide Rule Scales are "Reverse"
Scales:
Front: Ground Size (Feet), Image Size (CM, FT), Focal Length
(Inches), Altitude (Feet)
Rear: L, A DF [ CF, CIF, T, S, C ] D, DI, K
Logo Style 4
No Artwork Mark
No Copyright Mark
Stamped Aluminum Posts
"Grooved Stamped Posts Contoured to Finger Tip"
Grooved Convex Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
Slide Tension Springs
Slide Aerial Photo side has "57" artwork mark, no copyright
mark.
Includes Original Box
Includes Case with Conversions and Formulas
Leather case with plastic insert.
Appears that the case used to have a "DYMO Embosser" label applied.
Cannot read what it said.
Includes Instruction Manual
Includes "Slide Rule Guarantee Registration Card"
Excellent Condition
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Aristo 0903LL Scholar
Purchased July 8, 2020
Ebay
$19.25 Shipped
Arrived July 12, 2020
Manual
on ISRM Scales:
Front: L, K, A [ B, CI, C ] D, S, ST, T
Rear: 25cm [ S, LL2, LL3] 8 inch(bi-directional)
Convex Plastic Cursor
Manufacturing Code "3LR28"
Includes Plastic Box
“Dieter Engel…” written in pencil
Excellent Condition
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Aristo 867U Darmstadt
Purchased July 19, 2020
Ebay
$17.12 Shipped
Arrived July 24, 2020
Scales:
Front: K, A [B, BI, CI, C] D, P, S, T
x³, x² [ x², 1/x², 1/x, x ] x, √(1-x²), sin, tg
Top: Transparent Centimeter Scale
Bottom: Transparent Inch Scale
Rear: [L, LL1, LL2, LL3]
[lg x, e^0.01x, e^0.1x, e^x]
Aristo-Darmstadt
Dennert & Pape Hamburg
"5328" Date Code Stamp
Clear back over slide with hairlines at indexes
Plastic Cursor
Includes Leather Case
Worn but functional
Stamped "ARISTO MADE IN GERMANY"
Manufacturing Code Stamp "5328"
Not the later alphanumeric Aristo date code
Oughtred Society Journal Article: DENNERT
& PAPE and ARISTO Slide Rules 1872 - 1978
Old enough to have the "circle and angle" symbol at the right end of
the scale, Figure 16 in the above article, which supposedly ended in
1952, with "Nr. 867U" catalog number.
1953, Lot 28
Good Condition
Crack in body at left end of K scale
Broken plastic on back
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Pickett N4-ES
Manual
on ISRM Site …or at least the only one I could find that discusses
the TWO Tangent scalesPurchased September 24, 2020
Ebay
$42.70 Shipped
Arrived October 1, 2020
Scales
Front: LL1+.00D/-.00D, LL2+.0D/-.0D, DF/m [ CF/m, TH, SH, Ln, L, CI,
C ] D, LL3+.D/-.D, LL4+D./-D.
Rear: ∛ #1, ∛ #2, ∛ #3, DF [ CF, CIF, T1, T2, ST, S Cos, CI, C ] D,
DI, √ #1, √ #2
Manufactured 1962 - 1964
Aluminum
Logo Style 4
No Artwork Mark
“MADE IN U.S.A.” under logo like Style 5
Stamped Aluminum Posts
“Grooved Stamped Posts Contoured to Finger Tip”
Dull, not shiny
Grooved Convex Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
Slide Tension Springs
Slide has “PICKETT & ECKEL INC. CHICAGO ILL. U.S.A.”
Pickett moved to California in 1964
Plastic Cursor
Dirty and cloudy. Cleaned up well.
Slightly Yellowed
Includes Leather Case
“FRANK BUSH” stamped inside case flap
There has been a sticker on the front and back of the case, like
price tags?
There is still some adhesive remaining from each sticker. Still
sticky, so probably recent.
There are scratches on the case where someone removed the stickers.
They are not deep scratches.
Good Condition
Dirty, Cleaned up well.
Complete
Operates smoothly
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KL-1 Circular Slide Rule
Purchased October 7, 2020
Ebay
$42.68 Shipped
Shipping from Uzbekistan (yes, really!)
Arrived October 15, 2020
Came with a post card from Moscow
Scales
Front: A, D
Back: DI, S, T
Perhaps more like BI, CI | D, S, T ?
Pink Plastic "Pillbox" Case
Manual
Two Screws on Face, rather than three.
Excellent condition
Translations:
Logarithmic Scale: логарифмическая шкала
Circular: круговой
Calculator: калькулятор
Engineer: инженер
Circular Logarithmic Ruler KL-1: круговая логарифмическая линейка
КЛ-1
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Frederick Post 1457 Mannheim
Trig
Purchased October 15, 2020
Ebay
$20.07 Shipped
Arrived October 15, 2020
Same as Roos SR-109
Manufactured 1941 - 1945
Material: Wood stock with plastic laminate, plastic end pieces
Made by The Roos Company prior to Charvoz-Roos merger (1946)
According to ISRM, 1457s made in 1956 had metal end pieces
Scales:
Front Scale: T, DF [ CF, CIF, CI, C ] D, S, ST
Back Scale: Conversions [ B, K, L, C ] Trig Identities
Good condition.
Slide NOT delaminating
Cursor loose, slides too easily. Is spring faulty, or installed
incorrectly? Perhaps I can fix it.
Top stator rail not aligned with bottom rail
Includes "Alligator Skin" Leather Case
Compare to Roos SR-109 above.
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Sun Hemmi No. 130 System
Darmstadt
Purchased November 19, 2020
Ebay
$47.82 Shipped
Shipping from Haifa, Israel
Shipped November 22, 2020
Shipped via Israel Post
Arrived December 3, 2020
Scales:
Front: 27cm || L, K, A [B, CI, C] D, P || S, T
Scales not labeled except for D (SIN) and P (COS)
S and T on front edge as SIN / COS and tg / Ctg
Reverse scales (CI, COS, Ctg, but not P) in Red
Rear: [L, LL1, LL2, LL3]
[lg x, e^0.01x, e^0.1x, e^x]
Back: Conversions
Date Code "OC"
Includes cardboard box/case
"SUN HEMMI Bamboo Slide Rule"
Box does not have ends
Stars drawn on box
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Pickett Model 200
Purchased January 11, 2021
Ebay
$17.83 Shipped
Seller accidentally shipped me the wrong slide rule, so he is
shipping this one the next day and letting me keep the
extra rule !
Arrived January 18, 2021
Pickett
Metal Slide Rules Chronology Pickett
Metal Slide Rules - A Brief Update Manufactured Early 1953-1955?
Aluminum
Shiny edges, not corroded or dark
Logo Style 3
Stamped Aluminum Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Grooved Rails
Male Slide
No Slide Tension Springs
Scales:
Front: K, A [ B, CI, C ] D, L
Back: Blank [ S, ST, T ] Blank
Includes leather case with pocket clip
Initials “J.C.P.” written below clip
Good condition
Smooth operation
One small crack in each cursor lens
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K&E N4058W Beginner’s Slide
Rule
Clark
McCoy's K&E N4058W Scans Page Sent to me accidentally when I ordered the Pickett Model 200 , so the seller let me keep it!
Manual
on Clark McCoy’s Site Includes leather case
Manufactured 1954-1960
One-piece clear plastic cursor
Scales:
Front: A [ B, CI, C ] D, K
Back: Equivalents [ S, L, T ]
Fair condition
Printing at right end of scales is worn
Smooth operation
"V.L.M" written on back
Unusual?
Does not have the "window" on the back of the rule to read the S, L,
and T scales.
There is a rounded finger cutout at the right end of the back of the
rule, but no window.
Rounded cutout seems irregular. Added by an owner?
Clearly labeled "N4058W" on back. The model without the window that
is closest is labeled "4058D"
Emailed Clark McCoy
Same as K&E
N4058W on Smithsonian Museum web page
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Pickett Model N14 ES
Military Ranging
Birthday present from Lys
She got it from Ebay
She gave it to me March 20, 2021
Includes
Cardboard box
"138" written on one side and one end of box
Leather case with slot for instruction slip
"US" embossed in gold on front, partly worn off
"138" writtin inside flap
Plastic instruction slip
Belt loop
Slide Rule Guarantee Registration Card
Rule in original plastic bag
Receipt from "Northeast Technical Institute"
$10.00
October 15, 1975
Pam Betteys
For "Slide Rule #138"
Scales
Front Scale: LL1+/-, LL2+/-, A [ B, T Cot, ST, S Cos, K, C ] D,
LL3+/-, LL4+/-
Back Scale: Opposite angle Deg, Deg, Mils, Mils [ Apex angle, Tan
CoTan, Sin-Tan, Sin CoSin, Base C ], Distance D, A
Manufactured 1958 -1962
Aluminum
Logo style 4
Stamped Aluminum Posts
"Grooved Stamped Posts Contoured to Finger Tip"
"138" engraved on front left post
Grooved Convex Lens
Extended Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
Slide Tension Springs
Like-New condition
Clean and Shiny
Complete
Operates smoothly
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Pickett Model 500 Ortho
Phase Log Log
Purchased May 18, 2021
Ebay
$21.34
Shipped via USPS
Arrived May 21, 2021
Scales
Front Scale (artwork: G-10): LL0, LL00, A [ B, T, ST, S ] D, K
Back Scale (artwork: H-10): L, LL1, DF [ CF, CIF, CI, C ] D, LL3,
LL2
Manufactured 1948-1950
"Period 1"
Magnesium
Edges corroded and dark
Slide and Cursor slide easily and smoothly
Logo Style 1 "P&E"
"U.S.A. COPYRIGHT 1948" on back of slide, left end.
So, Manufactured 1948-1950 ?
Grooved Rails
Male Slide
Stamped Stainless Steel Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Stainless Steel?
Shiny!
Serial Number stamped on top bar: B060316
No Slide Tension Springs
An early version:
Artwork marks G-10 and H-10 (ISRM also shows one with no artwork
marks. Is that earlier?)
Heavier serif scale labels
Black dot values on CI scale
No dot, circle, or arrow to indicate descending values on trig
scales
Felt slip cover
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Pickett Model N200-T Trig
Purchased June 18, 2021
Ebay
$26.69 Shipped
Shipped via USPS
Arrived June 24, 2021
Manufactured 1964-1975
Logo Style 6
Aluminum
Shiny edges, not corroded or dark
Stamped Aluminum Posts
Posts with "Hooked" finger contour
Circular machine marks on posts
Mike Konshak at ISRM told me he thinks the “hooked” posts were an
experiment between the square posts and later curved posts. That would
mean this rule was manufactured in the middle 1960’s.
Grooved Convex Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
No Slide Tension Springs
Scales:
Front: K, A [ B, CI, C ] D, L
Back: Blank [ S, ST, T, C ] D
Includes leather case with top flap
Pull flap to pull rule out of case
Good condition
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Pickett Model 300
Purchased August 4, 2021
CT Auctions; "Caring Transitions" Estate Sale
$100 Shipped, with Pickett Model 300, 600, 1000
Shipped via USPS
Arrived August 17, 2021
Scales
Front Scale(Artwork 42): LL1, A [ B, T cot, S Cos, C ] D, LL2
Trig scales marked with < and >
Back Scale: LL3, DF [ CF, CIF, CI, C ] D, L
Inverse scales marked with <
Manufactured 1950-1953?
Magnesium
Feels lighter than the Model 200 and 700
Edges corroded and dark
Slide and Cursor slide unevenly
"Period 2"
Logo Style 3
Grooved Rails
Male Slide
Stamped Stainless Steel Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Includes leather case without pocket clip
“JIMERSON” stamped on case
Triangle Pickett logo on both sides of case
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Pickett Model 600
Purchased August 4, 2021
CT Auctions; "Caring Transitions" Estate Sale
$100 Shipped, with Pickett Model 300, 600, 1000
Shipped via USPS
Arrived August 17, 2021
Scales
Front Scale(Artwork 81): LL1+, LL1-, A [ B, T, ST, S, T, C ] D, DI,
K
Back Scale: LL2+, LL2-, DF [ CF, CIF, CI, L, C ] D, LL3+, LL3-
Descending values on CI, CIF, and trig scales marked with
left-pointing arrows
Manufactured 1950-1953?
Magnesium
Feels lighter than the Model 200 and 700
Edges corroded and dark
Slide and Cursor slide unevenly
"Period 2"
Logo Style 3
Grooved Rails
Male Slide
Stamped Aluminum Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Includes leather case with pocket clip
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Pickett Model 1000
Ortho-Phase Duplex
Purchased August 4, 2021
CT Auctions; "Caring Transitions" Estate Sale
$100 Shipped, with Pickett Model 300, 600, 1000
Shipped via USPS
Arrived August 17, 2021
Scales
Front Scale(Artwork 26): A [ B, T Cot , ST, S Cos] D, K
Back Scale(Artwork 27): DF [ CF, CIF, CI, C ] D, L
Note the CI scales with the numbers circled
Manufactured 1948-1950
"Period 1"
Magnesium
Edges corroded and dark
Slide and Cursor slide easily and smoothly
"U.S.A. COPYRIGHT 1948" on back of slide, left end.
Logo Style 2
This logo used 1949-1950
So, Manufactured 1949-1950 ?
Grooved Rails
Male Slide
Stamped Stainless Steel Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Stainless Steel?
Shiny!
Serial Number stamped on top bar: A117221
No Slide Tension Springs
This would be the second version:
Artwork marks 26 and 27
Lighter, condensed sans serif scale labels
Circled values on CI scale
No circles or arrows to indicate descending values on trig scales or
CIF
The first version had Artwork marks J-10 and K-10, heavier serif
scale labels, black dot values on CI scale; compare to my Model 500
Felt slip cover
Includes
Manual
“How To Use The Pickett 1000 Ortho-Phase Duplex Slide Rule”
Copyright 1948 Pickett & Eckel, Inc.
Written on cover in pencil:
William H. McLean, Jr. U.S.M.C. U.S. Naval Academy Prep School
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Pickett Model 1006 Duplex
Trig
Purchased February 13, 2022
Ebay
$42.70 Shipped
Arrived February 22, 2022
Manufactured Mid 1960s
Aluminum
Front of Slide:
Logo Style 4
“MODEL N 1006-ES TRIG”
“MADE IN U.S.A.”
No Artwork Mark
Back of Slide:
“PICKETT ALL-METAL SLIDE RULES”
“PICKETT & ECKEL, INC. CHICAGO, ILL. ©1959”
No Artwork Mark
Stamped Aluminum Posts
Posts with “Hooked” finger contour
Grooved Convex Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
No Slide Tension Springs
Scales:
Front Scale K, A [ B, ST, T, S, C ] D, DI
Back Scale Ln, DF [ CF, CIF, CI, C ] D, L
Descending values on CI, CIF, and trig scales in red with
left-pointing arrows
Good condition
Cleaned cursor and sliding surfaces
Aligned top rail to bottom rail
Includes Leather Case with Pocket Clip
Pull Tab to remove rule from case
Pull Tab has Style 6 Logo
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Radiac Calculator No. 1
Lys got me this! I really don’t know much about it.
ISRM says:
“Designed by William Orr (1951), BRL Mod/NSN Nr.:6665-99-911-0060 made
for British & Canadian Governments.”
I found the manual on Amazon as a Kindle book.
Scales:
Front Scales: Dose, Exposure
Back Scales: Yield, Weapon Radius, Single shot Damage Probability,
K-Factor Adjustment
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Pickett Model 400 Business
Rule
Purchased January 30, 2023
Ebay
$27.06 Shipped
Arrived February 2, 2023
Manufactured late 1950s
Aluminum
Scales:
Note: Special C% and R% scales for Cost and Retail mark up. DF &
D scale labeled as RF & R.
Front Scale (artwork: 43): K, A [ B, CI, C ] D, L
Back Scale: R%, RF [ CF, Unit, Doz(C%), Gross, C ] R, C%, Gross,
Doz(R%), Unit
Front of Slide:
“Model 400”
“PICKETT & ECKEL INC. CHICAGO 3, U.S.A.”
Back of Slide:
Logo Style 4
Artwork Mark “43” above logo
Square Stamped Posts
Grooved Convex Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
No Slide Tension Springs
Good condition
Includes Leather Case with Pocket Clip
Rivets at top of side stitching
Logo Style 3 stamped at top of both sides
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Pickett Model 100 “Douglas
Sky Rule”
Lys got me this!
Manufactured 1950-1953?
Magnesium
Feels lighter than the Model 200 and 700
Edges corroded and dark
Slide slides unevenly
Cursor difficult to slide
I’m going to try to clean up some of the corrosion along the top and
bottom edges.
"Period 2"
Logo Style 3
Grooved Rails
Male Slide
Stamped Aluminum Posts
"Smooth Stamped Posts Contoured to Finger Tip"
Plain Flat Lens
Machined Metal Cursor Bars
Includes leather case without pocket clip
Pickett Logo Style 3 embossed on each side
Douglas Sky Rule logo embossed in middle of each side
“Major J. F. Buniowski” written on one side
Includes instruction booklet
Smaller than standard Picket instruction book
Folded up and inserted in the leather case along with the rule
Good condition
Written by A. A. Mahoff
Scales:
Front Scale (A side)(Artwork #56): Dynamic Pres., Temp Rise [ Static
Pres., Pres. Alt, Density Alt., C ] D, True Mach No, T.I.A.S., True Air
Speed
Each scale has a numeric label, 1-9, at the right end
Back Scale (B side): Impact Pres., Std. Temp., Pres. Alt. [ Temp.
Vernier, Pres. Alt., Conversions, Douglas Sky Rule Logo] True Mach No.,
Dial Airspeed., Temp. Conv.
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Aristo 868 Studio
I was browsing Ebay and found this rule at a good price, so I ordered
it. I like Aristo rules’ design and layout, so this rule is a fun
“compare and contrast” to my Pickett Model 600
and Aristo 867U Darmstadt .
Purchased July 7, 2023
Ebay
$29.78 Shipped
Arrived July 14, 2023
Scales:
Front: LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Back: T, ST, DF [ CF, CIF, CI, C ] D, P, S
Cursor
Multiple hairlines: PS, KW
The cursor is installed upside-down: The “Aristo” logotype on the
cursor bar is upside-down. The “kW” and “HP” marks are over C and D
scales instead of A and B scales
Cursor screws covered in some sort of “gunge”. That cleaned up with
a spudger.
I need to figure out how to remove the cursor so I can clean it and
turn it over.
Includes Leather Case
Manufacturing Code Stamp “6013”
Oughtred Society Journal Article: DENNERT
& PAPE and ARISTO Slide Rules 1872 - 1978
1960, Lot 13
The “13” appears to be double-stamped. The “60” is harder to
read.
An Aristo rule manufactured in 1960 ought to have an alphanumeric
code, according to the JOS article linked above. Maybe I have read this
incorrectly.
Good Condition
“Gutmann H.” engraved between “75” and 80 marks on S scale.
“GH” engraved on edge of rule opposite Manufacturing Code.
Includes Leather Case
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Pickett Model N700-T A-2
"U. S. AIR
FORCE AERIAL PHOTO SLIDE RULE TYPE A-2"
I had been meaning to order one of these “New In Box” Pickett Model
N700-T rules from Sphere Research Slide Rule Universe for some time.
I probably didn't need another Model 700, but the 700 was the
lowest-price “New In Box” Pickett at the Slide Rule Universe, and
I really like the 700. It came to my attention that Sphere Research was
planning to close down by the end of the year, so I placed my order.
When it arrived, I was pleased at the excellent condition of the box
and its contents. The rule was in a plastic sleeve inside its leather
case, and there was something sticky sticking the sleeve to the rule. I
peeled the sleeve off the rule, which left sticky residue on the “Front”
of the rule, but not on the back. I washed the rule with Dawn dish soap
and water, and that removed the residue from the face of the rule and
the sliding surfaces. Now it is good as new!
I was surprised to see the slide tension springs. I have a good
assortment of Pickett pocket rules, and none of my others have the
tension springs. I was beginning to believe that none of Pickett’s
pocket rules came with the tension springs, but here they are. I have
seen pictures on ISRM of Pickett pocket rules with cutouts on the rails
that would seem to accommodate tension springs, but I wasn't sure that’s
what the cutouts were for. Now I know.
I was also glad to see this rule has a “Style 5” logo, since I didn't
have any examples of that.
So, I have another Pickett Model 700, and I paid more for it than I
usually like to pay for a rule. However, with its features and its
condition, I’m glad I got it.
Purchased September 6, 2023
Sphere Research Slide Rule Universe
$75 Shipped
Manual
on ISRM Manufactured 1962-1964
Aluminum
Shiny edges, not corroded or dark
Documentation states that Aerial Photo Slide Rule is "Front" and
Slide Rule Scales are "Reverse"
Scales:
Front: Ground Size (Feet), Image Size (CM, FT), Focal Length
(Inches), Altitude (Feet)
Rear: L, A DF [ CF, CIF, T, S, C ] D, DI, K
Logo Style 5
Stamped Aluminum Contoured Posts
Grooved Convex Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
Slide Tension Springs
Includes Case with Conversions and Formulas and Pocket Clip
Pull Tab to remove rule from case
Pull Tab has Style 6 Logo
Includes Original Box
Includes Instruction Manual
New-In-Box condition.
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Post 1447
A gift from Aly on October 3, 2023
Manufactured March 1968
Manual
on ISRM Scales:
Excellent condition
Same scales and audience as K&E N4058W, but MUCH nicer!
Smooth operation
Really nice rule!
Includes plastic case
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Halden Calculex
Alyssa got this for me! This is a very nice little circular rule that
has suffered some sort of catastrophe in its life. It is missing its
metal outer ring and handle, and one of its two glass pieces. The scales
look like they may be tarnished. The rivets seem to be showing through
the faces of the outer scales. However, the inner and outer scales move
easily, as does the glass.
I think I could make a replacement glass with a hairline out of
Plexiglas if I can find the correct thickness. The outer ring and handle
would be more of a challenge.
Maybe the best part of this is the tiny leather-bound instruction
manual. The manual is well-written, with lots of operation examples and
reference tables. They packed a lot of information on its 94 tiny pages.
The last page, originally blank, has handwritten notes for “Time
allowed”, apparently for the number of hours to complete X operations at
Y minutes each. The note appears to have been written with a fountain
pen with green ink. The manual has no copyright date.
Lys got me this!
Rough condition
Missing outer ring and handle
Missing Front glass
Intact Rear glass
Glass and Inner and Outer move easily, with occasional
roughness
Includes leather case
Nice soft leather folding case with snap
Includes instruction book
Leather bound tiny instruction book
Handwritten notes on last page
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Pickett Model 800-T
"MODEL 800-T LOG LOG
SYNCHRO-SCALE"
Purchased June 5, 2024
Ebay
$32.95 Shipped
Arrived June 10, 2024
Manual
on ISRM Pickett
Metal Slide Rules Chronology Manufactured 1958 - 1960
Aluminum
Shiny edges, not corroded or dark
Front of Slide:
Logo Style 4
“MODEL 800-T LOG LOG”
“SYNCHRO-SCALE”
Artwork Mark 105
Back of Slide:
“PATENTS APPLIED FOR”
“PICKETT & ECKEL, INC. CHICAGO”
Artwork Mark 108
Scales:
Front: LL1+0.01/-0.01, A [ B, ST, T 0., Cot <10.0, S, Cos, C ] D,
DI, K
Rear: LL2+0.1/-0.1, DF [ CF, CIF, L, CI, C ] D, LL3+1.0/-1.0
Descending values on CI, CIF, trig, and reciprocal log-log scales in
red with right-pointing arrow
Stamped Aluminum Posts
"Grooved Stamped Posts Contoured to Finger Tip"
Grooved Flat Lens
Nylon Cursor Bars
No Grooves in Rails for Cursor
Grooved Slide
Slide Tension Springs
Includes Case with plastic insert
“Bill Todd” stamped inside flap
Appears that the case used to have a "DYMO Embosser" label applied.
Cannot read what it said, but I would guess “Bill Todd”.
Excellent Condition
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Wish List
Log-Log Rules
Pickett Model 800 and 803
The Pickett Model 500 , Model 800 , Model 803, Model 2, Model 3, and Model 4 seem to make up a “spectrum” of Log-Log
rules. I probably don’t need ALL of them in my collection. Yet, I am
strangely compelled…
Also, an N3P or an N4P would be great, but are harder to come by.
Aristo Studio 968
I enjoy the nice graphic design of Aristo slide rules. I also like
Aristo’s scale layout, with the trig scales on the body, and the
addition of a P scale.
Nestler 0130 MultiMath
Post Versalog
K&E Log-Log Rules
I have lumped the K&E rules together because there are a lot of
K&E Log-Log rules, and I am not well-versed in the differences
between all of them. The 4081-3s seem to be the “classic” K&E
Log-Log rules. I like the 4181-1 pocket-size Log-Log rules. The 68-1100
“Deci-Lon” seems to be the flagship, like the Pickett N4 .
I would need to study them a bit more before I started shopping for
K&Es.
Misc
Pickett Model 1010SL
The Pickett Model 1010 is a nice trig rule. It appears to be an
evolution of the Model 1000 . The 1010SL looks
like the model 1010, but with Square Root scales in addition to the A
and B scales. I don’t think I need a 1000 and a 1010, but the 1010SL is
an interesting enough variation that I’d like one.
Circular Slide Rules
Concise Model 300
A nice circular Log-Log rule, in Concise’s nice style.
Scales
Front Scale: K, A, D ( C, CI, B, L )
Back Scale: LL3, LL2, D ( C, S Cos, T1 Cot1, T2 Cot2, ST )
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Concise Model 270
Scales:
Front Scale: L, D ( C, CI, A, K )
Back Scale: DI, D ( S, T1, T2, ST )
Concise Model 271
Scales
Front Scale: L, D ( C, CI, A, K )
Back Scale: DI, D ( S Cos, T1 Cot1, T2 Cot2, ST )
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Copyright ©2024 A. Eric Rinehart
Concise 300 on International Slide
Rule Museum
Concise 270 on International Slide Rule
Museum
Concise 271 on International Slide Rule
Museum