Synchronous mains electric clock of the self-starting type
1934
1934
1932
1955; 1830
1934
1932
1933
1934
1932
2000-100 BCE
Before 1932
1934
1933
1934
1933
1903 (original); 1982 (model)
1933
1933
1934
1990-96
1934
Before 1932
1932-1933
1934
1830 (original); 1967 (model)
4000-2001 BCE
1801-1892 (prepared); 1946 (element replaced)
1932
circa 1932
circa 1932
1933
1932
1933
1933
1933
1932
circa 1932
1962-05
circa 1932
1933
1933
1934
1933
1932
1934
circa 1934
circa 1933
1970-1900
1933
1933
10000-5000 BCE