Details
A Thatcher's Calculating Instrument,
by Keuffel & Esser, New York, No. 4012/6495, with cylinder rotating within a cage of triangular scales, on oak base with printed instructions, insruction booklet and makers' case -- the base 23½ in. (60 cm.)
by Keuffel & Esser, New York, No. 4012/6495, with cylinder rotating within a cage of triangular scales, on oak base with printed instructions, insruction booklet and makers' case -- the base 23½ in. (60 cm.)