
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1784
1785
1794
1797
1780
1795
1785-1795
1785
1785
1785
1785-1789
2000-100 BCE
1783
1782-1793
1785-1790
1784
1784
1791
1786
1787
1790
1796
1794
1792
1795
1790
1795
1795
1790
1792
1792
1790
1785-1795
1781-1790
1782
1787
hallmarked 1788
1796-1797
1790
1990-96
circa 1780
1784
1784
1794
1785
1772 (original); 1919 (model)
1792
1791-1792
circa 1795