Addac adding machine
1926
Cordingley's computometer', adding machine, c 1900.
1890-1910
Quixsum Fractional Adding Machine
1924-1930
Arithmographe polychrome adding machine by Charles Dubois
1865-1875
Summira 7 adding machine
1927
"American" Adding Machine
1912-1920
Mechanical counter
1891-1900
Adding machine by DTA
Simple wooden adding device with stylus
Mechanised adding machine, paper and case
1920-1940
Adding machine
1790
Mechanical counter for billiards
"American" adding machine
Pangborn adding machine ("The Calculator")
1908-1930
Example (no.6173) of the "Rapid Computer" patented in 1892 by the Baker-Vawter Co.
1892-1900
Adix adding machine in case
circa 1905
Union spiral adder
1905
Case for mechanical counter for billiards
Alpina calculating machine
Arithmographe polychrome adding machine, with wooden case and bone stylus
1865-1875
Locke Adder calculating device
1901-1910
Adix adding machine
1903-1905
Mechanical counter for billiards
Quixsum Fractional Adding Machine
1924-1930
"Adix" adding machine (1905)
1905-1905
"Locke adder" calculating device, patented 1901
1901-1910