»Dr.
Roth Calculator with Direct Display«, 1841
Early 8-disc adding machine in ruler-form by Dr. Didier Roth, Paris. With full tens transfer. Setting to
zero by pull-out of left feed-rack. Marked: "Dr. Roth, Inven, Paris 1842". No set stick, only 2 screws on brass
front plate, blocked. In original mahogany housing.
Estimate: € 3.000/5.000
US$ 3,000/5,000
Reserve: € 2.500/ US$ 2,500
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