This notched band adder has a metal front and back, painted gray and black. There are eight columns, eight bands, and eight windows below the bands to show the result. The columns are hooked at the top for carrying and at the bottom for borrowing. Along each column, a row of digits along the right provides for addition and, along the left, for subtraction. Across the top is a zeroing bar. The stylus fits across the inside top of a green leather carrying case. The machine is marked: MADE IN U.S.A. It is also marked: Adds [/] Subtracts [/] Aids in Multiplication.
This small device was given to the Smithsonian by economic consultant Frank M. Graves.
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