K&E 4083 Family of Slide Rules

Scale set #1 (1939-1947)

L LL1 DF = CF CIF CI C = D LL3 LL2  
L00 LLL0 A = B T ST S = D Th Sh2 Sh1 

Scale set #2 (1947-1954)

LL02 LL03 DF = CF  CIF  CI  C = D LL3 LL2  
L LL01 LL1 A = B T ST S = D Th Sh2 Sh1

Scale set #3 (1954-1956)

LL02 LL03 DF = CF  CIF  CI  C = D LL3 LL2  
Sh1 Sh2 Th A = B T ST S = D DI LL01 LL1

Scale set #4 (1956-1962)

LL02 LL03 DF = CF  CIF  CI  C = D LL3 LL2  
Sh1 Sh2 Th A = B T SRT S = D DI LL01 LL1

Scale set #5 (1962-1972) 68 1434

LL02 LL03 DF = CF  CIF  CI  C = D LL3 LL2  
Sh1 Sh2 Th A = B T SRT S = D DI LL01 LL1