Antique Computing Instrument Collection - Gem Adding Machine

This is the black case model of the standard version of the Gem adding machine, manufactured by the Automatic Adding Machine Company, New York. It is a chain driven adder with a reset knob at right. It comes with the original vinyl storage pouch and a retractable stylus. According to Antique Office Machines: 600 Years of Calculating Devices, this small adding machine was introduced in 1904 and was a very popular and successful product at that time. As a reflection the serial number of the presented one is 407729.