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