
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1785
1794
1782
1787
hallmarked 1788
1778
1782-1793
1785-1790
1784
1784
1791
1786
1787
1790
1794
1780
1792
1790
1790
1792
1790
1781-1790
1783
1785
1785
1785-1789
1792
2000-100 BCE
1778
1790
1785
1792
1990-96
1791-1792
circa 1780
1787
1783-1787
1783
1705-1737
1791
1778-1780
1788
1791
1790-1794
1784
1785
1785
1787
1780