1960s Manual Pocket Calculator

This great little vintage pocket calculator is from the 1960s before electronic calculators became more compact and affordable. Does addition,

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1960s Manual Pocket Calculator

ids.si.edu/ids/deliveryService?id=NMAH-DOR2014-038

Keuffel Esser 68 1130 Deci-Lon 5 pocket slide rule full set 1960 USA - Vintage Man Stuff