Mechanical desktop calculator, direct key, Comptometer, metal / plastic, made by Felt and Tarrant, Chicago. Illinois, United States of America, 1915-1920
A comptometer that consists of series of metal and plastic keys fixed into thirteen rows on a rectangular tan metal keyboard. The plastic tops of the keys are green or yellow and each has a black or a white number written across them. At the front of the keyboard is a row of eleven round windows that display numbers. Decorative scrollwork has been attached to either side of the keyboard. There is a metal lever with a black handle attached to the right side of the keyboard. A rectangular metal dust cover accompanies the comptometer.