"Locke adder" calculating device, patented 1901

Made:
1901-1910

"Locke adder" calculating device patented 1901 and made by C.E. Locke Manufacturing Company, Kensett, Iowa.

Details

Category:
Mathematics
Object Number:
1990-429 Pt1
Materials:
felt, paint and tin (metal)
type:
adding machine
credit:
Andreas Lanz