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