Addac adding machine
1926
1926
1926
1927
circa 1927
1924
1925
1922
1927
1923
1924
1925
1924-1927
1922-1923
1922-1923
1922-1923
1922-1923
1927
1923
1934
1926
2000-100 BCE
1924
1955; 1830
1925-1927
1923
1925
1927
circa 1927
1925
1990-96
1922-1925
1924
1927
1922-1924
1923
1922-1923
1922-1923
1922-1923
1922-1923
1922-1923
1924-1927
1925-1926
1925
1927
1934
1922-1923
1922-1923
1923
1926
1922-1925