
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1668; 1924
1785-1790
1791
1785
1794
1785
1785
1787
1795
1785-1795
1785-1789
1791
1786
1787
1790
1794
1792
1790
1795
1790
1792
1790
2000-100 BCE
1795
1792
1785-1795
hallmarked 1788
1795
1772 (original); 1919 (model)
1990-96
1794
1790
1785
1792
1791-1792
1788
1791
1785
1785
1795
1787
1785
circa 1795
1787
1790
4000-2001 BCE
1785-1795
1790-1794
1705-1737