Compound Microscope by Carl Zeiss, Jena, German, 1870-1888
1870-1888
1870-1888
1970
1967
circa 1912
1910-1940
1976
1871-1900
1905-1915
1900-1945
1925-1935
1920-1930
1891-1910
1900-1940
1980-1987
1901-1920
1900-1940
1895-1899
1950-1965
1880-1900
1939-1945
1900
1940
1900-1950
1901-1945
1926-1929
1920-1950
1930-1950
1910-1920
1895-1900
1905-1915
1910-1920
1938-1942
1941-1960
1890-1900
circa 1948
circa 1930
circa 1922
circa 1930
1939-1945
1891-1930
1970
1906-1911
1876
1965
1851-1900
1910-1930