Burroughs class 5 automatic (electrically driven) adding machine, serial no. 1518036. Burroughs class 5 automatic (electrically driven) adding machine 1940-1950
Comptometer by Felt & Tarrant Manufacturing Co., USA, c. 1920 Comptometer by Felt & Tarrant Manufacturing Co. 1920-1925
Electric Comptometer by Felt and Tarrant, Chicago, USA with 12 digit sterling keyboard, model 992, serial no. 47627 Electric Comptometer by Felt and Tarrant 1950-1965