
Early balance spring watch by Thomas Tompion
1675-1679
1675-1679
1673
1680
1680
1680
1675
1670
1670
1672
1680
1668-1672 Probable
1670
2000-100 BCE
1990-96
1667
1666
1670-1680
1680
1670
1671
1675
1666-1680
1675
1666
4000-2001 BCE
1642-1649 (original); 1883 (model)
1990-95
1668; 1924
1610; 1923
1666-1667
300 BCE; 1905-1915
1678
1679
1936
1674-1679
1673
1910-130
circa 2000 BCE
700-100 BCE; 1930-1950
30
1-79 CE; before 1914
circa 1700-1600 BCE
1668
1672
2000-1350
2000-1350
2000-1350
2000-1350
1850-1350
10,000-2,000 BCE