American, early 1st quarter 20th century, stamped on the end "H.N. MORSE, TRENTON, N.J." and on the side "PAT'D DEC. 17'01." Made of heavy brushed steel with folding steel legs and described in Morse's 1907 catalog as follows: "The Calcumeter consists of a number of movable dials (each dial containing ten depressions which easily catch the pencil point or stylus), which are accurately adjusted under the perforations in the face plate." The 1907 catalog lists 64 different models, with from 6 to 10 dials, with and without resetting dials, and including special models for fractions, grain, architects, English money, and Indian money. Calcumeters were the probably the best made dial adding machines of the early 20th century and all models are becoming difficult to find.
