Vintage Collectible TASCO Pocket Arithrometer Mechanical Calculator

This dates back to the 1940s according to our online research, and is an exhibit at the Smithsonian Museum of American History. It was designed to assist with adding and subtracting numbers. The instructions are missing but can be found online. Included is the stylus, which tucks into a special slot at the top of the original case, which is indeed in an aged state as visible in photos.
 
All parts work as intended – the sliding plate, or subtraction shield, moves up and down, all 8 columns of numbers move easily with the stylus, the lever at the top moves all numbers back to zero. 
 
H 5 3/8” x L 3” x D 1/8”
 
Disclaimer: We have tried to make sure colors shown in photos are representative of the real colors of each item. We have tried to identify all imperfections in descriptions, but we may have missed some. If you are unhappy with your purchase, let us know.