Commemorative plate
1800
Collection of 56 commemorative plates reflecting aspects of science and technology, most with pictorial or anniversarial imagery, [c1800-1990]
1800
1857
1897
1930
1930
1932
1956
1957
1959-1960
1960
1961
1966
1967
1968
1969
1969
1969
1969
1972
1973
1974
1975
1976
1977
1977