
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1791
1794
circa 1800
1798
1797
1784
1791
1786
1800
1787
1790
1796
1800
1794
1800
1800
1783-1800
1800
1792
1795
1800
1790
1802
1795
1795
1790
1785-1795
1792
1802
1790
1799-1802
1785
1793-1803
hallmarked 1788
1785
1799
1787
1796-1798
1796-1797
1785-1789
1802
1785-1790
1784
1795
1792
1785-1795
2000-100 BCE
1783
1785