Synchronous mains electric clock of the self-starting type
1934
1934
circa 1930
1934-1935
1932-1936
1935
circa 1930
1937
1937
1932
1930
1931
1936
1931
1935
1931
1935
1930
1935
1936
1935
1934
1933
1937-1937
1955; 1830
1935
1933
1934
1935
1935
1936
circa 1930
2000-100 BCE
1936
1930-1931
1932
Before 1932
1934
1932
1934
1930-1935
1937
1930
1937
1933
1933
1990-96
1934
1930
1935
1935