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