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Troncet's "Totalisateur", complete with pencil-stylus; (size of instrument 4 3/4" x 6 7/8" x 3/16") in cardboard case.
Troncet's 'Totalisateur' complete with pencil stylus in cardboard case.This simple device was the earliest of a number of circular adding machines introduced at the end of the 19th century. The design is essentially that of the 17th century rotula.
Troncet's "Totalisateur", complete with pencil-stylus; (size of instrument 4 3/4" x 6 7/8" x 3/16") in cardboard case.
cardboard case for Troncet's "Totalisateur", complete with pencil-stylus; (size of instrument 4 3/4" x 6 7/8" x 3/16").
