Keuffel and Esser, Standard Scales

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

L02 K&E 4081-5 20in

L08 K&E 4088-5 20in All-glass cursor

L07 K&E 68-1608 Polyphase

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

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