Antique Early 1900 Gem Automatic Adding Machine w/ Original Case

An antique (circa 1900s) gem adding machine by Automatic Adding Machine Manufacturers (New York) called "My Personal Adding Machine." It is in excellent condition and comes in it's original box, which shows minor wear. Missing the stylus that originally came with this machine. Please see photos and ask any questions when determining condition.

Forgot to list serial number, which is 403821.