Addac adding machine
1926
1926
1926
1934
1925
1925
1925
1926
2000-100 BCE
1955; 1830
1990-96
1926
1925
1934
1925
1930 (replica); 1834 (original)
1926
1801-1892 (prepared); 1946 (element replaced)
1925
1925
1926
1925-1926
1903 (original); 1982 (model)
1830 (original); 1967 (model)
4000-2001 BCE
1950-1920
1971-1900
1926
1926
1926, May
circa 1925
2000-1350
circa 1925
1925
1972-3
1945-50
1925
1925
1925
1925
circa 1925
1990-95
1925
1925
1925
1925
30 CE
30 CE
1859; 1986
3500-1000
1925