A good Thomas de Colmar Arithmometer
No. 2083, with 16-digit carriage, 8-slide input bars, frosted glass note panel door opening for period box containing red finished marker pins, in mahogany case with campaign style lacquered brass corners, in laid oval brass lid plaque inscribed E. H. Stone, mounted on adjustable cast iron and part polished mahogany angled table stand - 27.1/2in. (70cm) wide