
Watch movement with spring detent escapement by John Arnold and Son
1787
1787
1790
1790
1790
1790
2000-100 BCE
1788
1705-1737
1788
1787
4000-2001 BCE
1790
1668; 1924
1990-95
1642-1649 (original); 1883 (model)
1610; 1923
1788
1936
1790
circa 3000 BCE
2000 BCE
1788
1790
100 BCE-300 CE; 1890-1920
2000-1350
4000-30 BCE
10000-5000 BCE
10000-500 BCE
1972-3
1789
2000-1000
1788
1880-120
1800- 500 BCE
1300-1700; 1801-1900
1790
circa 1800 BCE
15/7/27
1790
15/7/27
1840-160
circa 3000 BCE
3000 BCE
circa 3000 BCE
circa 3000 BCE
circa 3000 BCE
circa 3000 BCE
1789
3000 BCE
circa 3000 BCE