71939 hand written on the bottom of the base in pencil
5 x 15 x 7 1/2 in.
Calculator is on a wooden base which is part of a disappearing desk top according to the Bell web site. Calculator consists of two interconnecting metal components with turning handles for internal wheels, one on the upper part and two one each side of the lower part. Components are labeled with numbers vertically on the top and horizontally along the bottom with levers and markers. Pasted on the bottom of the base is a paper label with initial operating instructions from the maker; manufacturer's name illegible. The black varnish on the numbers of the upper part has been rubbed away to reveal brown metal underneath.