Addac adding machine
1926
1926
1930-1940
1934
1930-1940
circa 1927
circa 1930
1938
1938
1922-1923
1922-1923
1922-1923
1922-1923
1921
1926
1934
1935
1935
1924
1927
1934
1939
1923
1936
1938-1940
1955; 1830
circa 1938
1933
1924-1927
1928
1934-1935
1932-1936
1927
1935
circa 1930
1940
1940
1937
1937
1938
1938
1932
1930
1924
1925
1928
1927
1931
1936
1931
1935