Rolls Record-6 Pocket Adding and Subtracting Machine
Sun, 2010-02-07 16:31 — walker
Donor: Anonymous
A pocket adding and subtracting machine that was manufactured and sold during the 1960s. The machine was made in Western Germany.
Calculations are made by shifting around the lines of numbers below were the actual digit is with the stylus. The subtraction operation is on the reverse side. The results for both operations appear at the top in each of the six little holes that contain a digit. The bar at the top is used to reset the machine.
