Synchronous mains electric clock of the self-starting type
1934
1934
1938
1938
1945
1946
1934
1935
1935
1934
1939
1936
1946
1938-1940
1955; 1830
circa 1938
1933
1946
1934-1935
1946
1943
1935
1940
1940
1937
1937
1938
1938
1945
1942
1936
1946
1940-1945
1935-1945
1935
1935
1940-1944
1942
2000-100 BCE
1943
1936
1944-1945
1933
1938 and 1951
1940
1938
1940
1938
1938
1935
1938