From: Cleo McCall
Does anyone have any information on this old tin machine? It is about 5 by 8 by 3.5" high sitting on a base 7 by 14". Printed on the top are these instructions: Place index finger (do not use stick or pencil) in slide hole next to number to be added; press on slide and pull down as far as possible. Do not operate slides with jerky or too-rapid motion. Slow, smooth operation assures accuracy and efficiency...To clear machine:--- beginning from the right, make additons in each column so "0" will appear in each register. Any comments or offers are welcome.
The X-Number World of Calculators