Microphotometer model GII by Carl Zeiss
1960-1965
1960-1965
1907
1907
1898
1939
1930-1945
1926-1929
1925-1929
1925-1929
1925-1929
1900-1950
1910-1920
1910-1920
circa 1930
circa 1948
circa 1930
1900-1945
1950-1965
1891-1910
1871-1900
1980-1987
1880-1900
1905-1915
1900
circa 1912
1939-1945
1970
1910-1940
1976
1925-1935
1920-1930
1901-1920
1900-1940
1895-1899
1900-1940
1930-1950
1940
1941-1960
1890-1900
1926-1929
1901-1945
1925
circa 1922
1967
1870-1888
1905-1915