
Model diving bell with 12 sinking weights
before 1753
before 1753
1765
1761
1705-1737
1752
1760
1752
1752
1752
1752
1751
1752
1761
1761
1762
1762
1762
1763
1761
1761
1761
1761
1755
1755
1772
1766
1750
1750
1771
1761-1762
1750-1774
4000-2001 BCE
1758-1769
1772-1773
1755
1772 - 1864
1765
1754
1768
1762
1753-1754
1769
1773
1774
1774; 1923
1753
1761
1642-1649 (original); 1883 (model)
1770
2000-100 BCE