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