John Lahr's Slide Rule Collection

Inventory of Slide Rules as of 1992

  ID Manufacturer St Country Model Name Serial Patent Patent Patent Patent Patent Patent Slide Pat Copyright Scales Scales L (cm) BaseMaterial ShellMaterial RunnerMaterial Case CaseMarkings Box Instruct Other Scales Comments ID
  1 Keuffel & Esser Co. NY USA <4088-2>   242299 06/05/1900 12/22/1908         08/17/1915   DF{CF,CIF,C}D K,A{B,S,T,CI}D,L 20.00 Mahagony Plastic Glass, Plastic Leather, Black PAT 2,000,337 None None L = labeled 0 - 10, 20 cm long Cracked glass in runner 1
  2 Keuffel & Esser Co. NY USA <4094>   699422 1,934,232           08/17/1915   DF{CF,CI,C}D   25.05 Mahagony Plastic Glass, Plastic Leather, Brown 4053-3S None None 10 inch; 25 cm Circ. No. 47 Constants 2
  3 Keuffel & Esser Co. NY USA <N4053-3>   286138 06/05/1900           2,086,502   A{B,CI,C}D   25.00 Mahagony Plastic Glass, Plastic Leather, Cardboard, Black 4053-3 None None 10 inch; 25 cm Circ. No. 47 Constants 3
  4 Keuffel & Esser Co. NY USA <N4053-3>   347349 1,934,232           2,086,502   A{B,CI,C}D,K {S,L,T} 25.00 Mahagony Plastic Glass, Plastic Leather wo flap, black   None None 10 inch; 25 cm Circ. No. 47 Constants 4
  5 Keuffel & Esser Co. NY USA 4081-3 LOG LOG DUPLEX DECITRIG (R) 299756 2,500,460 2,168,056 2,170,144 2,285,722 2,422,649       LL01,L,K,A{B,T,SRT,S}D,DI,LL1 LL02,LL03,DF{CF,CIF,CI,C}D,LL3,LL2 25.00 Mahagony Plastic Glass, Plastic, Metal Leather, Green PAT 2,000,337 Yes None None   5
  6 Keuffel & Esser Co. NY USA N4058W BEGINNER'S SLIDE RULE               05/02/1916   A{B,CI,C}D,K {S,L,T] 25.05 Box Wood White Paint Plastic w met. spring None   None C 1928 None Circ. No. 47 Constants 6
  7 Keuffel & Esser Co. NY USA N4058W BEGINNER'S SLIDE RULE                   A{B,CI,C}D,K {S,L,T] 25.05 Box Wood White Paint Plastic w met. spring Leather, Green   None None None K&E on slide. Newer than 6 7
  8 Keuffel & Esser Co. NY USA <4056> FAVORITE 736125 1,934,232           2,136,169   A{B,C}D {S,L,T] 25.05 Mahagony Plastic Glass, Metal Leather, Cardboard, Black K&E FAVORITE TRADE MARK None None None Circ. No. 47 Constants 8
  9 Keuffel & Esser Co.   USA N4080-3 LOG LOG DUPLEX TRIG 592468 1,930,852 2,168,056 2,170,144 2,285,722 2,422,649   2,086,502 1947 LL01,K,A{CF,CIF,CI,C}D,L,LL1 LL02,LL03,DF{B,T,ST,S}D,LL3,LL2 25.00 Mahagony Plastic Glass, Plastic, Metal Leather, Black   None None None   9
  10 Keuffel & Esser Co. NY USA 4058W BEGINNER'S SLIDE RULE               2,136,169   A{B,C}D {S,L,T] 25.06 Box Wood White Paint Glass, Metal Leather, Black K&E 4058W Slide Rule None None None Circ. No. 47 Constants 10
  11 Keuffel & Esser Co.     10 DECI-LON 10 DECI-LON 106250 2,500,460   2,534,695   2,422,649     1947,1961 Sq1,Sq2,DF{CF,CIF,L,CI,C}D,Ln0,Ln1,Ln2,Ln3 Ln-3,Ln-2,Ln-1,Ln-0,A{B,T,SRT,S,C}D,DI,K 24.92 Plastic Plastic Plastic, Metal Leather, Brown K&E 10 Deci-Lon Pat. 2,000,337 None None None   11
  12 Keuffel & Esser Co. NY USA <4088-3>   451594 1,930,852           Pat. Pend.   DF{CF,CIF,C}D K,A{B,S,T,CI}D,L 25.01 Mahagony Plastic Glass, Plastic, Metal Leather, Brown K&E POLYPHASE DUPLEX 4088-3S Pat. Pend. 2,000,337 None None None   12
  13 Keuffel & Esser Co. NY USA <4090-3>   472973 1,488,686 1,930,852 Pat. Pend.       Pat. Pend.   LL0,A{B,K,CI}T,S2,S1 L,LL1,DF{CF,CIF,CI,C}D,LL3,LL2 24.99 Mahagony Plastic Glass, Plastic, Metal Leather, Brown LOG LOG TRIG SLIDE RULE 4090-3S Pat. Pend. None None None   13
  14 Keuffel & Esser Co. NY USA 4058W BEGINNER'S SLIDE RULE               Pat. Pend.   A{B,C}D {S,L,T] 25.05 Box Wood White Paint Glass, Metal Leather, Cardboard, Black K&E BEGINNER'S SLIDE RULE 4058W None None None Circ. No. 47 Constants 14
  15 Keuffel & Esser Co. NY USA 4058C BEGINNER'S SLIDE RULE               No Slide   A{B,C}D {S,L,T] 25.05 Box Wood Clear Varnish   Leather, Cardboard, Black Missing Top None C 1928 None Circ. No. 47 Constants, Manual poor cond. 15
Sold $25, 1994 16 Keuffel & Esser Co. NY USA N 4095-3   132253 06/05/1900 12/22/1908         08/17/1915   DF3{CF3,C}D {CI}D 24.99 Mahagony Plastic Glass, Plastic None   None None None   16
  17 Keuffel & Esser Co. NY USA <4054>   320361 1,934,232           2,086,502   A{B,CI,C}D,K {S,L,T} 25.00 Mahagony Plastic Glass, Plastic, Metal Leather, Cardboard, Black 4054 K&E None None None Circ. No. 47 Constants 17
  18 Keuffel & Esser Co.   USA N4058W BEGINNER'S SLIDE RULE                   A{B,CI,C}D,K {S,L,T} 25.01 Box Wood White Paint Plastic w met. spring Leather, Green, Thin K&E N4058W None None None Circ. No. 47 Constants 18
  19 Keuffel & Esser Co. NY USA N4058W BEGINNER'S SLIDE RULE               2,136,169   A{B,CI,C}D,K {S,L,T} 25.00 Box Wood White Paint Glass, Metal Leather, Black, Thin K&E N4058W Slide Rule None None None Circ. No. 47 Constants 19
  20 Keuffel & Esser Co. NY USA N4058W BEGINNER'S SLIDE RULE                   A{B,CI,C}D,K {S,L,T} 25.00 Box Wood White Paint Plastic w met. spring Leather, Green, Thin K&E N4058W None None None Circ. No. 47 Constants 20
  21 Keuffel & Esser Co.   USA N4058W BEGINNER'S SLIDE RULE                   A{B,CI,C}D,K {S,L,T} 25.04 Box Wood White Paint Plastic w met. spring Leather, Green, Thin K&E None None None Circ. No. 47 Constants 21
  22 Keuffel & Esser Co. NY USA N4058W BEGINNER'S SLIDE RULE                   A{B,C}D {S,L,T] 25.00 Box Wood White Paint Glass, Metal Leather, Black, Thin K&E 4058W Slide Rule None None None Circ. No. 47 Constants 22
  23 Keuffel & Esser Co.   USA N4058W BEGINNER'S SLIDE RULE                   A{B,CI,C}D,K {S,L,T} 25.00 Box Wood White Paint Plastic w met. spring Leather, Green, Thin K&E None None None K&E on slide. Newer than 6 23
  24 Keuffel & Esser Co. NY USA 4058C BEGINNER'S SLIDE RULE                   A{B,C}D {S,L,T] 25.00 Box Wood Clear Varnish Glass, Wood, met. sp. Leather, Cardboard, Black K&E BEGINNER'S SLIDE RULE 4058C None None None Circ. No. 47 Constants 24
  25 Keuffel & Esser Co. NY USA 4058 W BEGINNER'S SLIDE RULE                   A{B,C}D {S,L,T] 25.03 Box Wood White Paint Glass, Metal Leather, Cardboard, Black K&E BEGINNER'S SLIDE RULE 4058W None None None Circ. No. 47 Constants 25
  26 Keuffel & Esser Co. NY USA <4088-3>   344883 06/05/1900 12/22/1908         Pat. Pend.   DF{CF,CIF,C}D K,A{B,S,T,CI}D,L 25.00 Mahagony Plastic Glass, Plastic, Metal Leather, Brown   None None None   26
  27 Keuffel & Esser Co. NY USA <4056>   943971 1,934,232           Pat. Pend.   A{B,C}D {S,L,T] 25.00 Mahagony Plastic Glass, Metal None   None None None Circ. No. 47 Constants 27
  28 Keuffel & Esser Co.   USA N4080-3 LOG LOG DUPLEX TRIG 510175 1,930,852 2,168,056 2,170,144 2,285,722 2,422,649     1947 LL01,K,A{CF,CIF,CI,C}D,L,LL1 LL02,LL03,DF{B,T,ST,S}D,LL3,LL2 25.00 Mahagony Plastic Glass, Plastic, Metal Leather, Black K&E None None None Runner cracked & loose 28
  29 Keuffel & Esser Co.   USA <4071-3>   775824 2,500,460 2,168,056 2,170,144 Pat. Pend.     2,086,502 C symb. DF{CF,CIF,CI,C}D,L K,A{B,T,ST,S}D,DI 25.00 Mahagony Plastic Glass, Plastic, Metal Leather, Black K&E PAT 2,000,337 None None None   29
  30 Keuffel & Esser Co. NY USA N<4053-3>   23170 06/05/1900           2,086,502   A{B,CI,C}D,K {S,.,T} 25.00 Mahagony Plastic Glass, Plastic, Metal