Comptometer made by Felt and Tarrant Ltd.
late 1960s
Plus Adder Calculator
1925-1935
Monroe Comptometer
1920
ANITA Sumlock Comptometer
1956
Comptometer
1915-1925
Comptometer
1920-1930
Comptometer
Model K Electric Comptometer
1950
Burroughs Comptometer
1910
Felt & Tarrant comptometer
circa 1925
Glass encased sectional model of Comptometer by Felt & Tarrant
1927-1928