Synchronous mains electric clock of the self-starting type
1934
1934
1938
1938
1945
1946
circa 1938
1946
1946
1943
1947
1935
1940
1940
1937
1937
1938
1938
1932
1945
1942
1936
1946
1935-1945
1935
1935
1938
1947
1940
1938
1938
1935
1938
1936
1934
1939-1945
1933
1935
1932
1940-1944
2000-100 BCE
1934
1936
1944-1945
1934
1936
1946
1938 and 1951
1940
1932-1942
1938-1940