Monocular polarising microscope with triple rotating nosepiece and revolving stage
1940-1960
1940-1960
1941-1950
1959
1950-1965
1950-1965
1950-1965
1953
1960
1962
1950-1960
1941
1971-1980
1925-1933
1941-1950
1946
1941-1950
1934
1928-1932
1935-1950