"Unitas" calculating machine

Made:
1909 in Berlin
Unitas' calculating machine, Thomas de Colmar type with two slides.'

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Unitas' calculating machine, Thomas de Colmar type with two slides.'
Science Museum Group
© The Board of Trustees of the Science Museum

"Unitas" calculating machine, Thomas de Colmar type with two slides.

Details

Category:
Mathematics
Object Number:
1909-167 Pt2
type:
calculating machine (arithmometer)
credit:
J.C. Stevens Auction House