Johnston Adding Machine Company Seal Stamp


This black metal instrument has a rough finish and gold-colored trim. A tag on the front reads: Johnston Adding Machine Co. (/) (California Corporation).

The Johnston adding machine company would be acquired by Marchant Calculators, Inc. in 1957.

Date Made: ca 1956

Maker: Johnston Adding Machine Company

Location: Currently not on view

Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Adding Machines


Exhibition Location:

Credit Line: Gift of SCM Corporation, SCM Business Equipment

Data Source: National Museum of American History

Id Number: 1979.3084.005Catalog Number: 1979.3084.005Nonaccession Number: 1979.3084

Object Name: Seal Stamp

Physical Description: metal (overall material)Measurements: overall: 24.5 cm x 15.2 cm x 5.7 cm; 9 21/32 in x 5 31/32 in x 2 1/4 in


Record Id: nmah_1213800

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