Original mechanical calculating machine by Thales Patent, This classic pinwheel calculator represents an important stage in the development of office technology before the introduction of electric calculators. Thales machines were widely used by banks, insurance companies, industrial enterprises and public administrations throughout Europe. The offered example remains in fully working condition. The carriage moves correctly, all setting sliders operate smoothly, the counters function properly and the crank mechanism turns freely with the characteristic mechanical sound appreciated by collectors. The machine retains its original finish with an attractive authentic patina. Minor traces of age, surface oxidation and normal wear are present and consistent with its historical use. An excellent collector’s piece of early German office technology and industrial design.