This fine antique calculator with pinwheel mechanism is a Brunsviga B System-Trinks made in Germany circa 1910. The calculator works really well and remains in very good condition. It stands on the original solid wooden base, with metalwork pieces designed to be connected to the black-enameled metal cover. This cover is a protecting piece which also serves as a suitcase to comfortably carry the calculator. It bears a big-size inscription in silvery lettering: Trinks-Brunsviga. The inscription is composed of fine-looking letters in quite good condition. The calculator itself is also very well preserved and works wonderfully. It mounts a black-lacquered molded metal casing, with engraved white numbers that stand out clearly on the dark surface. To the left of the digit levers there is a circular mark with the manufacturing companys initials and the brand logo. Over it we can see the calculators serial number: Nº 35454. The base that supports the calculator is made of wooden pieces of different colors and is in good condition. The set preserves the original lock and key in excellent working order. Every lover of mechanical antiques will appreciate this amazing Brunsviga calculator, beautiful and functional, as it deserves. Brunsviga Calculators History The firm Grimme, Natalis & Co (GNC) was established in 1871 to build sewing machines and domestic appliances at Braunschweig, Germany. In 1892 engineer Franz Trinks was instrumental in securing the manufacturing rights to the Odhner calculator patents. The first machines were built according to W.T. Odhner's 1890 design and were distributed under the brand name "Brunsviga" (Latin for Braunschweig). Trinks continued to develop and refine the Brunsviga calculator over a period of almost 30 years. The "new Brunsviga" range appeared in 1925, and the "13-series" in 1927. Production resumed after the 1939-45 war with a new range of 13-series machines, a motorised version of the stepped-drum machine, and a range of small adding machines. Grimme, Natalis & Co was originally established as a "Commanditgesellschaft auf Aktien". On its fiftieth anniversary in 1921 it became Grimme, Natalis & Co AG. In 1927 the name was changed to "Brunsviga Maschinenwerke Grimme, Natalis & Co AG", and later to just "Brunsviga Maschinenwerke AG" In 1957 Brunsviga entered into an agreement with Olympia Werke AG, which led ultimately to the company being absorbed into Olympia in 1959. Production continued for a time as the Brunsviga Division of Olympia, before coming to an end in the late 1960s. About half a million Brunsviga machines were produced over a period of almost eighty years. The Trinks-Brunsviga calculators work with the pinwheel system developed by W.T. Odhner in the 1870s. It was inspired in turn by the arithmometer designed by Leibniz in the 16th century.