Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1610; 1923
1791
1775-1799 (original); 1900-1907 (model)
circa 1800
1797
1785
1772 (original); 1919 (model)
1783-1800
1705-1737
1785
1784
1782-1793
1795
1794
2000-100 BCE
1785
4000-2001 BCE
hallmarked 1788
1799
1795
circa 1800
1786
1791
1797
1784
1790-1794
1796
1791-1792
circa 1795
1790
around 1790
1792
1785-1789
1788
1788
1783
1790
1795
1800
1785
1784
1784
1800
1787
1800
1792
1785-1795
1792
1797