Wanted:

The Adder

Adding Machine

The Adder adding machine was invented ca.1902 by Arthur J. Postans, who had it "Patented Throughout the World." It was produced by The Adder Cash Register Syndicate, Limited of London, England. The Adder was nothing more than a simple adding machine and did not rise to the level of a true calculator.

Have one for sale? Please email me at Antikey.Chop@gmail.com