Thomas de Colmar arithmometer
- maker:
- Charles Xavier Thomas
Thomas de Colmar arithmometer, capacity 10 x 11 x 20, engraved:- "Thomas de Colmar, a Paris, inventeur, no.1273" incomplete (accepted to show details of construction)
Thomas de Colmar arithmometer, capacity 10 x 11 x 20, engraved:- "Thomas de Colmar, a Paris, inventeur, no.1273" incomplete (accepted to show details of construction)