Title
Plus calculator
Catalog Number
XB81.80
Type
Physical object
Description
Electric calculator that uses nine complement arithmetic.
Date
ca. 1949
Manufacturer
Bell Punch Company, Ltd.
Place Manufactured
UK
Identifying Numbers
| Model number |
909/C/V/504.929/A |
| Other number |
504 929 engraved in machinery beneath casing |
Dimensions
6 1/2 x 10 3/4 x 13 1/2 in
Category
Calculator/electromechanical
Collection Title
Gwen Bell artifact and book collection
Series Title
Pre-computing artifacts
Credit
Gift of Gwen and C. Gordon Bell
