This 12/13 comptometer has no comptometer logo. The error detection mechanism is inside the box and has a RED release button, which was standard on a model F. Serial numbers for these models starts at 100,000. Production on these model F's lasted for 5 years.
Date
ca. 1915
Manufacturer
Felt and Tarrant Mfg Co.
Place Manufactured
Chicago
Identifying Numbers
Serial number
114110
Stamped into the top plate.
Dimensions
overall: 6 in x 12 1/4 in x 14 5/8 in
Category
Calculator/mechanical
Credit
Gift of Lawrence Livermore National Laboratory (LLNL)
