Existing comment:
Joseph Hirshhorn's Addometer, around 1927
Businessman Joseph Hirshhorn, who would give his art collection to the Smithsonian Institution, owned one of the first examples of this adding machine. Sales of the instrument continued into the mid-1900s, as the advertisement attests.
Judy Wallace's pocket counter, around 1975
Judy Wallace used this pocket calculator to tally her spending as she shopped. She received the simple adding machine as an advertisement from Gino's, a fast-food restaurant in Maryland. |