This is an original Thomas deColmar Calculator called the “Arithmometer” dating to 1860s.  It is truly the Holy Grail of Calculators and rarely found.  This rare machine is stamped “Thomas deColmar Inventerur; S’adresser; 44 RUE DE CHATEAUDUN 44; PARIS; No 1806”; Exposition 16 Rue de la Tour Des Dames”.  It is in perfect operational and display condition.  Thomas de Colmar designed and built a revolutionary new calculating machine in 1820 that was called “The Arithmometer”, most say the first true mathematical calculator.  After Thomas de Colmar died, his son Thomas de Bojano briefly manufactured the machine in beautiful Oak wood case (prior de Colmar machines were painted black).  De Bojano soon sold the de Colmar patent to L. Payen and a few other manufactures.  It should also be noted that de Colmar always used contractors like Darras and Payen to manufacture machine in wood case with internal design components and stamped with “Thomas de Colmar” name.  After 1870s a variety of Arithmometer manufactures made this machine with their own stamped name like “Darras, Payen, Peerless, Burkhardt and Bunzel”.  The serial number is 1806 and one of the last machines made by Thomas deColmar as he died in 1870.  This brass faceplate has the original Gold Flake lacquered finish (Most machines have been re-lacquered).  It also has the original Ivory handles.  Thomas de Colmar machines now sell for $ 10,000 to $ 20,000+ and found mostly in museums.  It has eight setting levers, nine revolutionary counters and sixteen places in the result mechanism.  Size is 23" x 8" x 4" and weighs 23 pounds.  Our special thanks go to Professional Collector’s in Germany that has cleaned this machine internally, inspected and quotes “This is one of the best preserved deColmar’s….”.  Professional collectors know this is truly the Holy Grail of calculators and highlight to any collection, seldom found and near priceless.