One of the rarest and most desirable German calculators. For addition and substraction. Two German patents known. Serial no. 1580. Produced for only one year, 1908. Arithmetical inaccuracy caused by slow speed, but all functions and clearings are working. Only 6 x known world-wide! - A giant rarity in German calculating history and a fascinating museum-quality exhibition piece.
Reserve: 8,500/US$ 10,000