Ring transformer, 1892
1892
1892
1934
1872 (original); 1909 (model)
1955; 1830
2000-100 BCE
1893-4
1892
1775-1799 (original); 1900-1907 (model)
1990-96
1934
1891
1705-1737
1772 (original); 1919 (model)
1930 (replica); 1834 (original)
1801-1840 (original); 1901 (model)
4000-2001 BCE
1830 (original); 1967 (model)
1801-1892 (prepared); 1946 (element replaced)
1891
1891
1892
1730; 1967
1972-3
2500 BCE
1915-1825
1990-95
1892
1891
1901-950
1800-1830
1801-1850
1800-1830
1859; 1986
1891
1945-50
1891
1892
3000-1500
circa 1891
1891
1891
1892
3000-2000 BCE
1834-1836
1891
1892
2000 BCE
1891
1891
1892