Plus Rapid adding machine, standard farthings model

Plus Rapid adding machine, standard farthings model

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Plus Rapid adding machine, standard farthings model
Science Museum Group
© The Board of Trustees of the Science Museum

Plus Rapid adding machine, standard farthings model

Details

Category:
Mathematics
Object Number:
1939-185
Materials:
ivory, steel (metal), iron and glass
Measurements:
overall: 110 mm x 235 mm x 150 mm, 2.702 kg
type:
calculating machine
credit:
Bell Punch Coompany