Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1610; 1923
1791
1775-1799 (original); 1900-1907 (model)
1797
1785
1772 (original); 1919 (model)
1783-1800
1705-1737
1780-1800
1785
1784
1782-1793
1780-1800
1794
1795
2000-100 BCE
4000-2001 BCE
1785
hallmarked 1788
circa 1800
1799
1795
1781-1790
circa 1780
1786
1797
1784
1791
1790-1794
1796
around 1790
1780
1791-1792
circa 1795
1790
1792
1800
1788
1785-1789
1788
1790
1795
1783
1785
1784
1784
1800
1787
1800