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Science Museum Group Collection
© The Board of Trustees of the Science Museum
Exactus stylus-operated adding and subtracting device, with swivelling half plate for add and subtract options, marked "Mini-Add Made in England" c.1950
The Exactus is one of several simple stylus-operated calculators to have been popular in the mid 20th century.
Details
- Category:
- Mathematics
- Object Number:
- 1981-861
- Materials:
- steel (metal), tin (metal) and plastic (unidentified)
- Measurements:
-
overall: 5 mm x 75 mm x 110 mm, 0.06 kg
- type:
- adding machines
- credit:
- Post Office Telecom. Museum (Taunton)
