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