
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1785
1785
1794
1787
hallmarked 1788
1785-1789
1785-1790
1785
1791
1786
1787
1790
1794
1792
1795
1795
1790
1795
1795
1790
1792
1785-1795
1792
1790
1785-1795
2000-100 BCE
1790
1790
1785
1772 (original); 1919 (model)
1792
1990-96
1791-1792
circa 1795
1794
4000-2001 BCE
1787
1785
1705-1737
1788
1791
1790-1794
1785
1785-1795
1785
1795
1787
1791
1789-1795