Monroe Adding Machine

The Monroe Calculating Machine Co. was founded April 25, 1912 by Jay R. Monroe to manufacture calculating machines based on a designed by Frank Stephen Baldwin.

This Model-G mechanical adding machine, Serial Number 35782, was made between 1919-1921.

Let us know if you have an operating manual for it.

If you are interested in learning about mechanical adding machines try the Rechenmaschinen WWW site.