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K&E 4161-1 Family of Slide Rules
Scale set:
K DF = CF L CI C = D A
= T ST S C =
- 9061-1 --- 5" Plastic Doric Mannheim. Serial # 8226
- 4161-1 --- 5" Plastic Mannheim. Serial # 025324
Inch/K DF = CF L CI C = D A\cm
= T ST S C =
- 4161- --- 10" Plastic Mannheim. Serial # 007001