Artifact Details

Title

Plus calculator

Catalog Number

XB81.80

Type

Physical object

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

Description

Electric calculator that uses nine complement arithmetic.

Category

Calculator: electromechanical

Credit

Gift of Gwen and C. Gordon Bell

Lot Number

X6288.2012