199: A COLLECTION OF MECHANICAL ADDING MACHINES C 1910

Includes: An 'Addometer' eight-wheeled mechanical adding machine by Reliable Typewriter and Adding Machine Corp,; and A pair of 'Golden Gem' chain adding machines by Automatic Adding Machine Co., patent dated 1907.
Addometer measures 2.25 x 11.5 inches.
Signs of use and light oxidation, one Gem is missing a number tape.
$40 - $60