Addac adding machine
1926
1926
1921
1926
1955; 1830
1921
1925
1921-1926
1934
1922-1923
1922-1923
1922-1923
1922-1923
1923
2000-100 BCE
1923
1926
1924
1924
1925
1925
1922
1923
1924
1925
1926
1925
1930 (replica); 1834 (original)
1903 (original); 1982 (model)
1925
1990-96
1922-1925
1926
1922-1925
1922
1923
1923
1922-1924
1922-1924
1923
1922
1922-1923
1922-1923
1922-1923
1922-1923
1922-1923
1922-1923
1922-1923
1923
1934
1921