Addac adding machine
1926
1926
1930-1940
1948
1946
1943
1948
1921
1926
1945
1927
1938
1947
1938
1938
1935
1938
circa 1930
1940
1940-1949
1940
1936
1934
1929-1935
1939-1945
1937
1937
1950
1938
1938
1932
1951
1950
1950-1951
1930-1940
circa 1938
1935
1951
1950-1952
circa 1927
circa 1930
1930
1945
1924
1923-1948
1925
1935
1928
1922
1927
circa 1950