Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1610; 1923
1791
circa 1800
1775-1799 (original); 1900-1907 (model)
1797
1785
1990-96
1772 (original); 1919 (model)
1705-1737
1783-1800
1785
1784
1795
1794
1790
2000-100 BCE
1784
1785
1785-1790
4000-2001 BCE
1785
1799
hallmarked 1788
circa 1800
1795
1786
1791
1797
1785
1798
1784
1790-1794
1796
1790
1791-1792
1785-1789
1797
circa 1795
1783
1792
1788
1790
1795
1788
around 1790
1800
1784
1784
1785