Keuffel and Esser, Standard Scales

This gallery displays K&E slide rules with standard general-purpose mathematical scales. See K&E Specialty Slide Rule gallery for slide rules with special scales for specific industries and applications.

Keuffel & Esser Co., Hoboken, New York, sold and manufactured slide rules, drawing instruments and other technical supplies. Established in 1884, sold rules from 1886, began manufacturing their own rules in 1891 and continued until 1976. Over the course of their history Keuffel & Esser became the largest manufacturer of slide rules in the US and moved into CAD equipment in the 1980's. Click for More about K&E.




L001 K&E 4053-5
K&E N4053-5 S/N 755410
Made in U.S.A.
Front Scale Inch rule - A [ B, CI, C ] D, K - Metric Rule
Back Slide: [ S, L, T ]
Back: Equivalents and Abbreviations From U.S. Bureau of Standards


L02 K&E 4081-5 20in
K&E 4081-5 S/N 860426
Made in U.S.A.
Front Scale: LL00, LL0, A [ B, T, ST, S ] D, DI, K
Back Scale: L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2


L08 K&E 4088-5 20in All-glass cursor
K&E 4088-5 S/N 103104 c1922-1938
Made in U.S.A. - All-glass cursor
Front Scale: K, A [ B, S, T, CI ] D, L
Back Scale: DF [ CF, CIF, C ] D


L07 K&E 68-1608 Polyphase
K&E 68-1608 Polyphase S/N 050062
Made in U.S.A. - 1954
Front Scale Inch rule - A [ B, CI, C ] D, K - 20inch rule
Back Slide: [ S, L, T ]
Back: Equivalents and Abbreviations U.S. Bureau of Standards
Original owner: Michael P. Taylor, retired Director Dow Chemical. Graduated Univ of Houston, TX. Taught at TAMU and UH. Designed/Built the Houston Dow Center &Dow Chemical plant in Toronto.



P109 K&E 4031
K&E 4031
Made in U.S.A. - Pat June 5, 1900
Front Scale
5inch // A [ B, C ] D || 12cm
Back Scale
[ S, L, T ]
Back: Equivalents


P214 K&E 4031 (Finely Divided)
K&E 4031 (Finely Divided) s/n 302
Made in U.S.A. - Pat June 5, 1900
Front Scale
5inch // A [ B, C ] D || 13.7cm
Back Scale
[ S, L, T ]
Back: Equivalents


S044 K&E American
K&E American
Made in U.S.A. Est. date prior to1900 - Boxwood
Front Scale
10In // A [ B, C ] D || 25Cm
Back Scale
[ S, L, T ]
Channel: 25 to 52Cm scale


REF K&E 4041-3 with Decimal Keeper
K&E 4041-3 with Decimal Keeper
Made in U.S.A.
Front Scale
Inch // A [ B, C ] D || Cm
Back Scale
[ S, L, T ]
Archive: Clay Castleberry Collection


S042 K&E N4041-3
K&E N4041-3 s/n 833436
Made in U.S.A.
Front Scale
Inch // A [ B, C ] D || Cm
Back Scale
[ S, L, T ]
Original Owner: Roy A. VanBuren


S251 K&E 4053-2 8in
Finely Divided
K&E 4053-2 8 inch s/n 25
Made in U.S.A. - Pat June 8, 1900 - Finely-Divided Scales
Front Scale (scale labels on right)
8in // A [ B, CI, C ] D || LL
Back Scale: [ S, L, T ]



S262 K&E N4053-2 8in Finely Divided
K&E N4053-2 8 inch s/n175230
Made in U.S.A. - Improved cursor - Finely-Divided Scales
Front Scale (scale labels on left)
8in // A [ B, CI, C ] D, K  || 20cm
Back Scale
[ S, L, T ]


S082 K&E 4053
K&E 4053 No S/N
Made in U.S.A. - Early Pat June 8, 1900
Front Scale (scale labels on right)
10in // A [ B, CI, C ] D || LL
Back Scale
[ S, L, T ]


S043 K&E N4053-3
K&E N4053-3 S/N 55840
Made in U.S.A.
Front Scale (scale labels on left)
10in // A [ B, CI, C ] D, K || 25cm
Back Scale
[ S, L, T ]


S550 K&E N4053-3
K&E N4053-3 S/N 352463
Made in U.S.A. Note: Lens Protection on Cursor
Front Scale
10in // A [ B, CI, C ] D, K || 25cm
Back Scale
[ S, L, T ]
Cursor Patent 8-17-15


S043 K&E N4053-3
K&E N4053-3 S/N 031010
Made in U.S.A.
Front Scale
10in // A [ B, CI, C ] D, K || 25cm
Back Scale
[ S, L, T ]
Owned and used by Frank K. Armour, Born Dec 28, 1917 Toledo, Ohio. Died Feb 13, 2004 Louisville, Colorado. Graduate of Cleveland University c1940. Mr. Armour retired Vice President of Engineering for Interlake Steel, in Toledo, Ohio.


S095 K&E N4053-3
K&E N4053-3 S/N 464886
Made in U.S.A.
Front Scale
10in // A [ B, CI, C ] D, K || 25cm
Back Scale
[ S, L, T ]


S385 K&E 4053-3 c.1956
K&E 4053-3 c.1956
Made in U.S.A.- Plastic and wood construction
Front Scale
10in // A [ B, CI, C ] D, K \\ 25cm
Back Scale
[ S, L, T ]
 Back: Conversion Factors


S275 K&E 4054 Wood Sleeve
K&E 4054  s/n 55, Circa1901-1915
Made in U.S.A. - No laminate on ruler, Early cursor
Front Scale
10in // A [ B, C ] D || 26cm
Back Scale
[ S, L, T ]

Check out the mahogany storage sleeve with the tin metal insert.


S036 K&E 4054
K&E 4054 S/N 163668
Made in U.S.A. - Improved Cursor - added scales
Front Scale
A [ B, CI, C ] D, K
Back Scale
[ S, L, T ]


S067 K&E 4055
K&E 4055 S/N 526528
Made in U.S.A. - All Glass cursor
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]


S451 K&E 4055
K&E 4055 S/N 567857
Made in U.S.A. New Improved Cursor
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]


S086 K&E 4056
K&E 4056 S/N 871157
Made in U.S.A. - Metal frame cursor
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]


S053 K&E 4056
K&E 4056 S/N 944322
Made in U.S.A.
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]


S396 K&E 4058 Student's Slide Rule
K&E 4058 Student's Slide Rule
Made in U.S.A. - Note: all wood framed cursor
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]


S239 K&E (4058) Beginner's Slide Rule
K&E (4058) Beginner's Slide Rule
Made in U.S.A. - Note: all wood framed cursor
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]
Back : Equivalents (note slight differences from S396 above)


S478 K&E 4058C Beginners Slide Rule
K&E 4058C Beginners Slide Rule
Made in U.S.A. - Note: all wood framed cursor
Note: Student hid formulae in well - clever way to cheat
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]
Back : Equivalents (note slight differences from S396 and S239 above)


S045 K&E 4058W Beginner's Slide Rule
K&E 4058W Beginner's Slide Rule
Made in U.S.A. - Painted white before adding scales
Front Scale
A [ B, C ] D
Back Scale
[ S, L, T ]


S046 K&E 4058W Beginner's Slide Rule
K&E 4058W Beginner's Slide Rule
Made in U.S.A. - Note difference in Cursor frame
Front Scale
A [ B,  C ] D
Back Scale
[ S, L, T ]


S542 K&E N4058W Beginner's Slide Rule
K&E N4058W Beginner's Slide Rule
Made in U.S.A. - Note: One piece molded Cursor
Front Scale
A [ B,  C ] D
Back Scale
[ S, L, T ]


REF K&E 4065T (Trig)
K&E 4065T (Trig) - patent Oct 6, 1891
Made in U.S.A.
Front Scale
A [ B, S, C ] D
Back Scale
A [ B, T, C ] D
Archive: Clay Castleberry Collection


REF K&E 4070 Chisel Cursor
K&E 4070 Chisel Cursor
Made in U.S.A.- Note: Patent Oct 6, 1891
Front Scale
A [ B, C ] D
Back Scale
A [ BI, CI ] D
Archive: Ted White Collection


S010 K&E 4070-3 Trig
K&E N4070-3 Trig S/N 717360
Made in U.S.A.- Note: Standard trig scales (6,12 divisions/degree)
Front Scale
K, A [ B, T, ST, S ] D, DI
Back Scale
DF [ CF, CIF, CI, C ] D, L


S303 K&E 4070-3 Trig
K&E N4070-3 Trig S/N 329774
Made in U.S.A.-
Front Scale:  Note: Standard trig scales (6,12 divisions/degree)
K, A [ B, T, ST, S ] D, DI
Back Scale
DF [ CF, CIF, CI, C ] D, L


S431 K&E 4071-T
K&E 4071-T
Made in U.S.A.
Front Scale:  Note: Decimal trig scales (5, 10 divisions/degree)
A [ BI, T, CI ] D
Back Scale
A [ B, S, C ] D
Edge Scale: L


S304 K&E 4071-3
DeciTrig
K&E N4071-3 DeciTrig S/N 841357
Made in U.S.A.
Front Scale:  Note: Decimal trig scales (5, 10 divisions/degree)
K, A [ B, T Cot, ST, S  Cos ] D, DI
Back Scale
DF [ CF, CIF, CI, C ] D, L


S015 K&E 4080-3 Log Log Duplex Trig
K&E 4080-3 S/N 015307
Made in U.S.A
Front Scale: Note: 6,12 div/deg
LL0, LL00, A [ B, T, ST, S ] D, DI, K
Back Scale
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2


S299 K&E 4080-3S Log Log Duplex Trig
K&E N4080-3S S/N 743097
Made in U.S.A.
Front Scale: Note: 6,12 div/deg
LL0, LL00, A [ B, T Cot, ST, S Cos ] D, DI, K
Back Scale
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2
Original Owner: Howard (Red) Sandford, Boulder, CO


S008 K&E 4080-3S Log Log Duplex Trig
K&E N4080-3S S/N 563632
Made in U.S.A.
Front Scale: Note: 6,12 div/deg
LL01, K, A [ B, T Cot, ST, S  Cos ] D, L, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S005 K&E 4081-3 Log Log Duplex Decitrig
K&E 4081-3 S/N 145878
Made in U.S.A. - Notice RED LL0 scales, has non-KERCS Cursor
Front Scale: Note: 5,10, 20 div/deg
LL00, LL0, A [ B, T Cot, ST, S  Cos ] D, DI, K
Back Scale
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2


S005 K&E 4081-3 Log Log Duplex Decitrig
K&E 4081-3 S/N 618580
Made in U.S.A. - Notice Black LL0 scales
Front Scale: Note: 5,10, 20 div/deg
LL00, LL0, A [ B, T Cot, ST, S Cos ] D, DI, K
Back Scale
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2


S006 K&E 4081-3 Log Log Duplex Decitrig
K&E 4081-3 S/N 433406
Made in U.S.A.
Front Scale: Note: 5,10, 20 div/deg
LL01, L, K, A [ B, T Cot, ST, S Cos ] D, DI, L1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S536 K&E N4081-3 Log Log Duplex Decitrig
K&E N4081-3 S/N 602728
Made in U.S.A.
Front Scale: Note: 5,10, 20 div/deg
LL01, L, K, A [ B, T Cot, ST, S Cos ] D, DI, L1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2
Mr. Glen Williams was born November 4, 1918 in Adelaide, South Australia. Graduated from University of Detroit, BME, 1952.  Lt in the U.S. Army. Registered Professional Engineer. Board of Governors 1960-61 of Michigan Chapter of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHVE).  Employed by Carrier Corporation since 1952 in engineering and sales capacities. Died September 13, 2004 in Americus, Georgia. Click for More Pictures


S014 K&E N4081-3 Log Log Duplex Decitrig
K&E N4081-3 S/N 660187
Made in U.S.A.
Front Scale: Note: 5,10, 20 div/deg
LL01, L, K, A [ B, T Cot, ST, S Cos ] D, DI, L1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S013 K&E 4083-3 Log Log Duplex Vector
K&E 4083-3 S/N 914944
Made in U.S.A.
Front Scale: Note: 5,10, 20 div/deg
Sh1, Sh2, Th, A [ B, T Cot, ST, S Cos ] D, DI, LL01, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S252 K&E 4083-3S Log Log Duplex Vector
K&E 4083-3S S/N 131170
Made in U.S.A.
Front Scale: Note: 5,10, 20 div/deg
Sh1, Sh2, Th, A [ B, T Cot, ST, S Cos ] D, DI, LL01, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2
Original Owners: W.Dickinson [W1IUW], Jim Gockowski


P103 K&E 4088-1
K&E 4088-1 S/N 220461 c1924-1935
Made in U.S.A.- All Glass Cursor
Front Scale
K, A [ B, S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D


S332 K&E 4088-2
K&E 4088-2 Production #63 1913-1921
Made in U.S.A. - 8" scales - All Glass Cursor
Front Scale
K, A [ S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Original Owner: Les Moore, MI - Tool and Die Maker


S310 K&E 4088-2
K&E 4088-2 S/N: none 1913-1921
Made in U.S.A. - 8" scales - All Glass Cursor
Front Scale
K, A [ S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Original Owner: H.I.W


S412 K&E 4088-3
K&E 4088-3 Column Cursor c1913-1915
Made in U.S.A. - Column Cursor - No B scale
Front Scale
K, A [ S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Archive: Clay Castleberry Collection


S416 K&E 4088-3 
K&E 4088-3 Production #40
Made in U.S.A. - All Glass Cursor - c1913-1921
Front Scale
K, A [ S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Original Owner: A.R. Hopkins, ONU, EE class of '26,



S412 K&E 4088-3
K&E 4088-3 No S/N c 1915 Replacement Cursor c1935
Made in U.S.A. - Improved Cursor no B scale
Front Scale
K, A [ S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D


S416 K&E 4088-3 sn06
K&E 4088-3  Production #06
Made in U.S.A. - All Glass Cursor - c1922
Front Scale (added B scale)
K, A [ B, S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Original Owner: W.R.Clark


S438 K&E 4088-3
K&E 4088-3 S/N 120356 
Made in U.S.A. - All Glass Cursor
Front Scale
K, A [ B, S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Original Owners - On SR: B.Y.K., Sleeve: A.B.Muller


S488 K&E 4088-3
K&E 4088-3 S/N199114
Made in U.S.A. - All Glass Cursor
Front Scale- Note: different scale font than previous 4088-3's
K, A [ B, S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D
Original Owner - On Sleeve: Leown Reynolds, Ohio Northern Univ.


S009 K&E 4088-3
K&E 4088-3 S/N 307077
Made in U.S.A.
Front Scale
K, A [ B, S, T, CI ] D, L
Back Scale
DF [ CF, CIF, C ] D


S011 K&E 4091-3
K&E 4091-3 S/N 487456
Made in U.S.A.
Front Scale
LL0, A [ B, K, CI ] T, S2, S1
Back Scale
L, LL1, DF [ CF, CIF, CI, C ] D, LL3, LL2


S426 K&E 4092 Log Log S/N 4 (UK Model)
K&E 4092 Log Log S/N 4 (UK Model)
Made in U.S.A. - All Glass Cursor - Found in England
Front Scale
A [ B, S, C ] D
Back Scale
LL1, LL2, LL3 [ CF, T, CI ] D, L
Note variance in scales to later US models
Original owners Initials: H.V.H.


S068 K&E 4092-3
K&E 4092-3 S/N 5983
Made in U.S.A. - All Glass Cursor
Front Scale
LL0, A [ B, S, T, C ] LL3, LL2, LL1
Back Scale
DF [ CF, CIF, CI, C ] D, L


S038 K&E 4092-3
K&E 4092-3 S/N 7102
Made in U.S.A. - Metal framed cursor (replacement?)
Front Scale
LL0, A [ B, S, T, C ] LL3, LL2, LL1
Back Scale
DF [ CF, CIF, CI, C ] D, L


S535 K&E 4092-3
K&E 4092-3 S/N 187247
Made in U.S.A. - All Glass cursor - Used 1926-1930
Front Scale
LL0, A [ B, S, T, C ] LL3, LL2, LL1
Back Scale
K, DF [ CF, CIF, CI, C ] D, L
Parker D. Shepperd (1909-1963) used this slide rule at the University of Colorado in Boulder. Graduated 1930 with a mechanical engineering degree. Case has student's address at 1221 University, Boulder, CO, a fraternity house near the campus. Mr Shepperd worked in various firms designing commercial HVAC systems, such as General Electric in Schenectady, NY, and Johnson Service Company in Detroit, Cleveland, and Boston. One of his big projects was the John Hancock Building in Boston. Slide rule donated by his daughter, Marnie, and has now been permanantly transferred, with other items, to the University of Colorado Heritage Center.


S007 K&E 4092-3S
K&E 4092-3S S/N 398625
Made in U.S.A. - All Glass Cursor
Front Scale
LL01, A [ B, S, T, C ] LL3, LL2, LL1
Back Scale
K, DF [ CF, CIF, CI, C ] D, L


S470 K&E 4092-3S
K&E 4092-3S S/N 568870
Made in U.S.A. - New Improved Cursor - Stock fully laminated
Front Scale
LL0, A [ B, S, T, C ] LL3, LL2, LL1
Back Scale
K, DF [ CF, CIF, CI, C ] D, L


S049 K&E 4093-3
K&E 4093-3 S/N 339210
Made in U.S.A. - all glass Cursor - c1930
Front Scale
L, LL0, DF [ CF, B, CI, C ] D, LL3, LL2
Back Scale
Sh1, Sh2, Th [ SI1, SI2, TI  TI ] D, S, T


S263 K&E 4093-3
K&E 4093-3 S/N 489831
Made in U.S.A. - Improved Cursor
Front Scale
L, LL0, DF [ CF, B, CI, C ] D, LL3, LL2
Back Scale
Sh1, Sh2, Th [ SI1, SI2, TI  TI ] D, S, T


S043 K&E 4094
K&E 4094 S/N 730837
Made in U.S.A.
Front Scale
Inch // DF [ CF, CI, C ] D || Cm
Back Scale: Blank


P241 K&E 4097
K&E 4097 S/N 11765
Made in U.S.A. - Note: metal billet cursor spacers
Front Scale
DF [ CF, CI, C ] D
Back Scale
5in [ blank ] 13cm
Original Owner: B. B. Haenxl (on case)


P111 K&E 4097-C
K&E 4097-C S/N 40001
Made in U.S.A. - Note: metal billet cursor spacers
Front Scale
A [ B, CI, C ] D, K
Back Scale
5in [ S, L, T ] 13cm


P150 K&E 4097-C
K&E 4097-C sn 53942
Made in U.S.A. - note: Improved framed cursor
Front Scale
A [ B, CI, C ] D, K
Back Scale
5in [ S, L, T ] 13cm


P111 K&E 4097-D
K&E 4097-D sn 85986
Made in U.S.A.
Front Scale
A, DF [ CF, CI, C ] D, K
Back Scale
5in [ S, B, L, T ] 13cm


P222 K&E 4097-D
K&E 4097-D sn 142116
Made in U.S.A. - new Improved cursor
Front Scale
A, DF [ CF, CI, C ] D, K
Back Scale
5in [ S, B, L, T ] 13cm
Original Owner: Mrs. D.W. Morris, Dayton, Ohio


P113 K&E 4098A
K&E 4098A S/N 24208
Made in U.S.A. - Celluloid cursor spacers
Front Scale: A [ B, C ] D
Back Scale: 5in [ S, L, T ] 13cm
Back Adv: Fafnir Bearing
Original Owner: H.M.Nichols, B,F, Slurturvant Co.


P003 K&E 4150-1
K&E 4150-1 S/N 026541 - Simplex
Made in U.S.A.
Front Scale
DF [ CF, CI, C ] D, L
Back Adv: 25th Annual Conf. Financial Analysts Federation May, 1972


P110 K&E 4153-1
K&E 4153-1 S/N 009565 - Simplex
Made in U.S.A.
Front Scale
A [ B, CI, C ] D, K
Back Slide: [S, L, T]
Original Owner: James M. White


P083 K&E 4161-1
K&E 4161-1 S/N 468310
Made in U.S.A.
Front Scale
K, DF [ CF, L, CI, C ] D, A
Back Slide
[ T, ST, S, C]
Back: blank


S164 K&E 4161-3
K&E 4161-3 S/N 220636
Made in U.S.A.- all plastic stock
Front Scale
10inch // K, DF [ CF, L, CI, C ] D, A \\ 25cm
Back Slide
[ T, ST, S, C]
Back: Conversion Factors


P084_K&E 4181-1C Log Log Duplex Decitrig
K&E 4181-1C Log Log Duplex Decitrig S/N 147541
Made in U.S.A. - all plastic stock
Front Scale
LL01, L, K, A [ B, T, ST, S ] D, DI, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


P102 K&E 4181-1 C2 Log Log Duplex Decitrig
K&E 4181-1 C2 Log Log Duplex Decitrig S/N 117204
Made in U.S.A. - all plastic stock
Front Scale
LL01, L, K, A [ B, T Cot, ST, S Cos ] D, DI, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S481 K&E 4181-3 Log Log Duplex Decitrig
K&E 4181-3 Log Log Duplex Decitrig s/n 017779
Made in U.S.A. - all plastic (Ivorite) stock
Front Scale
LL01, L, K, A [ B, T Cot, SRT, S Cos ] D, DI, LL1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2



S016 K&E 68-1100 Decilon 10
K&E 68-1100 Deci-Lon 10 S/N 015134
Made in U.S.A.
Front Scale
Ln-3, Ln-2, Ln-1, Ln-0, A [ B, T Cot, SRT, S Cos, C ] D, DI, K
Back Scale
Sq1, Sq2, DF [ CF, CIF, L, CI, C ] D, Ln0, Ln1, Ln2, Ln3


REF  K&E 68-1130 Decilon 5
P045 K&E 68-1130 Deci-Lon 5 S/N 027314
Made in U.S.A.
Front Scale
Ln-3, Ln-2, Ln-1, Ln-0, A [ B, T Cot, SRT, S Cos, C ] D, DI, K
Back Scale
Sq1, Sq2, DF [ CF, CIF, L, CI, C ] D, Ln0, Ln1, Ln2, Ln3
Archive - Not in Collection


S483 K&E 68-1210 Log Log Duplex Decitrig
K&E 68-1210 Log Log Duplex Decitrig S/N 310216
Made in U.S.A.- Note like the early 4081-3 but re-labeled model#
Front Scale
LL01, L, K, A [ B, T Cot, SRT, S Cos ] D, DI, L1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S077 K&E 68-1251
Log Log Duplex Decitrig
K&E 68-1251 Log Log Duplex Decitrig S/N 127685
Made in U.S.A. - Note like the early 4081-3 and later 68-1210  but all-plastic with a thinner stock.
Front Scale
LL01, L, K, A [ B, T Cot, SRT, S Cos ] D, DI, L1
Back Scale
LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2


S381 K&E 68-1497 
K&E 68-1497 Doric S/N 610174 - Duplex
Made in U.S.A.
Front Scale
K, A [ B, T Cot, SRT, S Cos ] D, DI
Back Scale
DF [ CF, CIF, CI, C ] D, L


P104 K&E 68-1555 Doric
K&E 68-1555 Doric S/N 044486 - Duplex
Made in U.S.A.
Front Scale
K, A [ B, ST, S ] D, T
Back Scale
DF [ CF, CI, C ] D, L


REF K&E 68-1565 GP12
K&E 68-1565 GP12- Simplex S/N 027322
Made in U.S.A. - 1964
Front Scale
Sq1, Sq2, DF [ CF, T Cot,  SRT, S Cos, , CI, C ] D, A, K
Back Scale
cm (number) [ number, Conversions, logarithm ] inch (logarithm)
Archive - Clark McCoy collection


S201 K&E 68-1617
K&E 68-1617 S/N 470490
Made in U.S.A.
Front Scale
10inch // A [ B, CI, C ] D, K \\ 25cm
Back Scale: [ T, L, S]
Back: Conversion Factors


S504 K&E 68-1775
K&E 68-1775 S/N 860393
Made in U.S.A.
Front Scale
10inch // DF [ CF, CI, C ] D \\ 25cm
Back Slide: Blank
Back: Conversion Factors


S132 K&E 68-1892 K12 Prep
K&E 68-1892 K12 Prep
Made in U.S.A. - same as 4058
Front Scale
K, A [ B, S, CI T, C ] D, L
Back Blank
Warning: Do not clean this model using Windex w/Ammonia-D.
This is not an engine-divided rule and the ink wipes off.
I ruined a 4058 .


REF  K&E Doric- Celanese Celcon
K&E Doric- Celanese Celcon S/N 007039
Made in U.S.A.- Green Celcon Plastic
Front Scale
K, A [ B, ST, S ] D, T
Back Scale
DF [ CF, CI, C ] D, L
Archive - Not in Collection


P004 K&E 9068 Doric
K&E 9068 Doric S/N 8090
Made in U.S.A.
Front Scale
K, A [ B, ST, S ] D, T
Back Scale
DF [ CF, CI, C ] D, L


S159 K&E N9081-3 Doric
K&E N9081-3 Doric S/N 24919 - Duplex
Made in U.S.A.
Front Scale
LL01, K, A [ B, T, ST, S ] D, L, LL1
Back Scale
LL02, LL03, DF [ CF, CI, C ] D, LLL3, LL2

Click here on How to Date a K&E


Copyright © 2003-2006 International Slide Rule Museum