Addac adding machine
1926
1926
1918-1922
1918
1920
1917
1924
1925
1925
1916
circa 1920
1925
1921-1926
1922
1923
1924
1922-1923
1922-1923
1922-1923
1922-1923
circa 1920
1920
1955; 1830
1921
1918
1916-1917
1918
1926
1921
1926
2000-100 BCE
1917-1918
1924
1923
1934
1923
1918-1920
1918
1920-1925
1919
1920-1925
1917
1916
1920
1920
1925
1990-96
1920
1924
1920
1930 (replica); 1834 (original)