Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1610; 1923
1801
1791
1775-1799 (original); 1900-1907 (model)
circa 1800
1797
1799-1802
1772 (original); 1919 (model)
1705-1737
1797-1804
1794
1795
2000-100 BCE
4000-2001 BCE
1802
1802
hallmarked 1788
1799
1793-1803
1795
circa 1800
1797
1791
1790-1794
1796
1791-1792
circa 1795
1790
around 1790
1792
1800
1795
1788
1788
1790
1893-4
1804
1800
1800
1792
1797
1792
1800
1795
1800
1799
1795
1790
1796-1798