
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1791
1799
1800
1775-1799 (original); 1900-1907 (model)
circa 1800
1668; 1924
1610; 1923
1794
1782
1787
hallmarked 1788
1796-1797
1796-1798
circa 1800
1785-1789
1780-1800
1785
1783
1785
1785
1782-1793
1785-1790
1784
1798
1784
1797
1791
1786
1800
1787
1790
1796
1800
1800
1794
1780
1783-1800
1800
1792
1795
1800
1790
1795
1795
1790
1785-1795
1792
1790
1781-1790