
Pivoted-detent escapement watch by John Arnold
1776
1776
2000-100 BCE
1776
1705-1737
4000-2001 BCE
1642-1649 (original); 1883 (model)
1936
1990-95
1610; 1923
1668; 1924
1960-1979
1777
1777
1777
1776
1777
1776-1777
1776
1777
1777
1777
30 CE
30 CE
2686-2613 BCE
1888-185
1945-50
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
30-200
2000-1350
20-500
2000-1350
2000-1350
2000-1350
20-500
2000-1350
1850-1350
1940-1050
2000-1000
3500-1000
100 BCE-300 CE; 1890-1920
2000-1350
1972-3
2000-1000
circa 3000 BCE
circa 1800 BCE