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Image
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2
Non-Commercial Use
1
Category
Computing & Data Processing
1
Ophthalmology
1
Maker
British Tabulating Machine Company Limited
1
Herman Hollerith
1
Object type
punch (cutting tool)
2
Place
Letchworth
1
Letchworth, Hertfordshire, England, United Kingdom
1
Unknown place
1
unknown place
1
Material
metal (unknown)
2
Date
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Hollerith key punch, model 20, 1909-1932
1909-1932
Metal Punch
1920-1930