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K&E 4070-3 Family of Slide Rules
Scale set (1939-1962)
DF = CF CIF CI C = D L K A = B T ST S = D DI 4070-3 --- 10" Mahogany with laminated edges and metal rimmed cursor. Serial # 706952. 4070-3 --- 10" Mahogany with laminated edges, magnifier, and metal rimmed cursor. It has the K&E logo released approximately 1945. Serial # 310375.
DF = CF CIF CI C = D L K A = B T ST S = D DI