Bull electric-powered manual card punch

UvA Computer Museum catalogue nr 02.65

bull ponser
This card punch has 12 keys corresponding to the rows in a standard Hollerith card. Several keys can be pushed at the same time. The additional keys are for shifting the card. On touching a key lightly, the actual punching is done by an electromagnet-actuated mechanism.
The unit in our collection has a built-in power supply, operating from the (at the time) 220 Volt mains.
The punch has been restored in our atelier to working condition.
This machine was formerly in the collection of the Belasting en Douane Museum, Rotterdam, The Netherlands.

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