Notes: "While the Stima looks like a slide adder at first glance, it has much more in common with adding machines like the Rapid, Comptator, or S&N. The slides are brass bars that extend to the bottom of the adder where gear teeth on the sides of the bars turn the result wheels. The model designation MS-III means it is a hand-held model (vs. desk model in a stand), it has multiplication, subtraction, and 9 columns. Subtraction is by 9’s complement, and those digits are shown to the left and right of the slides. The Stima was first made in 1930 in Switzerland, and was still around in 1947. It is very robustly constructed. "
