Brunsviga calculating machine
1931-1939
Brunsviga calculating machine, 1892.
1892-1893
Brunsviga, size A calculating machine
1908-1912
Brunsviga Dupla calculating machine
1936-1939
Model 13Z-18 twin Brunsviga mechanical calculating machine (13 register)
1935-1939
Brunsviga twin calculating machine
1935-1939
Model 13ZK twin Brunsviga Calculating machine (13 register)
1936-1939
Brunsviga barrel calculator by Grimme
1892-1893
Brunsviga lever set calculator
1910
Mechanical Calculator
1915-1925
One of three mechanical hand calculators.
1930-1940
Barrel Calculating Machine
1890-1900
Model M Trinks Brunsviga calculating machine on wooden base with metal cover by Grimme
1930s
Model M Brunsviga calculating machine
1908-1912
Brunsviga desk-top calculator by Grimme Natalis
1902
"Matador" calculating machine c.1910
1910-1915
Brunsviga calculator by Grimme Natalis & Co
1900