|Sterling No. 565 Automatic Adding Machine.
Or Sterling "Add-it" Automatic Adding Machine.
Or Sterling Dial-A-Matic Automatic Adding Machine.
The Sterling Adding Machine is a simple device, using a series of gears and levers to make simple addition and subtraction calculations. The instructions are printed on the back of the box, making it easy to learn and use. To add, simply input a number using the large numbers around the dials, and then input the number to be added to it. Subtracting is only slightly different, as you rotate the dials counter-clockwise and use the smaller numbers inside the dials.
Despite being well over sixty years old, the calculator still works perfectly. Dials rotate smoothly and I have no trouble performing calculations with it. The included stylus doesn't appear to be the original, but it works fine. A mechanical pencil would also fit nicely into the small grooves.
|Small hole in the top is designed to hold the stylus.
I found this calculator on Ebay for about $8 and it's a pleasure to have it placed in my display among other beautiful and historical devices.
|I love vintage stuff. It's so pleasing to the eye.
|Back of the box shows how to use the device.
|Calculator with its stylus.
|Back of calculator.
"STERLING NO. 565
MADE IN U.S.A.
U.S. AND FOREIGN PATS PEND"