
Pivoted-detent escapement watch by John Arnold
1776
1776
1780
1776-1780
1776-1780
1776-1780
1778
1776
2000-100 BCE
1778
1778-1780
1990-96
circa 1780
1776-1780
1776-1780
1776
1772 (original); 1919 (model)
1705-1737
1780
1780
4000-2001 BCE
1936
300 BCE; 1905-1915
1778
1779
1776
1777
1777
1780
1777
30 CE
1778
30 CE
1780
1780
20-400
1780
30-200
20-500
20-500
1780
1972-3
1990-95
15/7/27
15/7/27
1840-160
1780
1780
1780
1780
1780