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K&E 4080 Family of Slide Rules
Scale set #1 (1937-1939)
L LL1 DF = CF CIF CI C = D LL3 LL2 LL00 LL0 A = B T ST S = D DI K
- 4080-3 --- 10" Mahogany with laminated edges. No printing on edge. Circular K&E logo. Serial number 521423. Purchased in 1936 with a 1936 copyright manual.
- 4080-3 --- 10" Mahogany with laminated edges. No printing on edge. Circular K&E logo. Serial number 522055.
- 4080-3 --- 10" Mahogany with laminated edges. No printing on edge. Serial number 585532.
Scale set #2 (1939-1947)
L LL1 DF = CF CIF CI C = D LL3 LL2 LL0 LL00 A = B T ST S = D DI K
- 4080-3 --- 1st Edition 10" Mahogany with laminated edges. Name is after .2 on L scale. Serial number 698763.
- 4080-3 --- 2nd Edition 10" Mahogany with laminated edges. Name is after .1 on L scale. Serial number 141247.
- 4080-3 --- 3nd Edition 10" Mahogany with laminated edges. Has K&E logo on right end. Serial number 378443.
- 4080-3 --- 4th Edition 10" Mahogany with laminated edges. Has K&E logo on right end. Range marks for LL scales. Serial number 405094.
- 4080-5 --- 20" Mahogany with laminated edges. No printing on edge. The serial number is 198329.
Scale set #3 (1947-1954)
LL02 LL03 DF = CF CIF CI C = D LL3 LL2 LL01 K A = B T ST S = D L LL1
- N4080-3 First Edition - 10" Mahogany with solid laminated edges and printing on the edge of the rule. Serial number 592267.
- N4080-3 Second Edition - 10" Mahogany with inlaid laminated edges and printing on the edge of the rule. Serial number 759186.
Scale set #4 (1954-1967)
LL02 LL03 DF = CF CIF CI C = D LL3 LL2 LL01 L K A = B T ST S = D DI LL1
The 4080 series does not have a scale set with the SRT scale as the 4081s do.