Addac adding machine
1926
1926
1930-1940
1934
1930-1940
1920-1925
1917
circa 1927
circa 1930
1915
1938
1938
1920-1935
1921
1926
1934
1935
1935
1927
1934
1915
1939
1923
1936
1938-1940
circa 1938
1924-1927
1928
1934-1935
1932-1936
1918-1922
1927
1915
1935
circa 1930
1940
1918
1940
1920-1929
1937
1937
1938
1938
1932
1920
1930
1917
1924
1925
1928
1927