Cylindrical Type Actinograph Exposure Calculator
circa 1888
circa 1888
1933
circa 1945
circa 1945
1960-1965
1924
1926
1939
1924
1939-1941
1939
1919
1920-1930
1955
1921
1907
1942
1930
1926-1936
1933
1942
1910
1942