1942
1940
1940-1945
1938
1939
1938 and 1951
1939-1945
1945
1940-1944
1937-1938
1938-1940
2000-100 BCE
1943
1937-1937
1944-1945
1955; 1830
1944
1990-96
1937
1801-1892 (prepared); 1946 (element replaced)
1938-1939
circa 1939
circa 1945
1903 (original); 1982 (model)