
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
1610; 1923
1642-1649 (original); 1883 (model)
1788
1936
1790
circa 3000 BCE
1788
100 BCE-300 CE; 1890-1920
2000-1350
1972-3
1789
2000-1000
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
circa 3000 BCE
circa 3000 BCE
1787
1790
1789
1789
1790
1790
1790
1788
1789
1790
1790