Allard's Computer Museum Groningen
The Comptometer
Comptometer click a big view
Here a view from the right
Comptometer manual
At the end of the year 2001 i got a this very old comptometer from Herman from Belgium.
Now 2 years later I got the Dutch manual from Leny. Leny's father in law J. Ruurs, who passed away this year, did use it for the sumlock on his work by KPM.
Thanks Leny for this donation! it has made the comptometer complete.
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Here the scans of the original Dutch manual
An example page 8 from the manual
