Details
An Arithmometre by Thomas de Colmar,
No. 940, with twelve-digit capacity, six slides, lacquered brass top-plate and (defective) ebony-veneered case -- 18 3/8in. (46.5cm.) wide
No. 940, with twelve-digit capacity, six slides, lacquered brass top-plate and (defective) ebony-veneered case -- 18 3/8in. (46.5cm.) wide