verification hole punch

Made:
1855
maker:
Herman Hollerith
Hollerith verification key punch, model 20

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Hollerith verification key punch, model 20
Science Museum Group
© The Board of Trustees of the Science Museum

Hollerith verification key punch, model 20

Details

Category:
Computing & Data Processing
Object Number:
1932-332
Measurements:
overall: 115 mm x 140 mm x 470 mm,
type:
punch - marking tool
credit:
Fujitsu Siemens Computers Ltd.