
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1791
1794
1798
1797
1791
1790
1796
1794
1792
1795
1790
1795
1795
1790
1792
1790
hallmarked 1788
1799
1796-1798
1796-1797
1795
1792
2000-100 BCE
1790
1990-96
1788
1791
1790-1794
1799
1795
1797
1799
circa 1795
1791-1792
1792
1794
1772 (original); 1919 (model)
1790
1705-1737
1775-1799 (original); 1900-1907 (model)
1797
4000-2001 BCE
1797
1936
1790
300 BCE; 1905-1915
1798 (original); 1977 (model)
1795
1798