
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1791
1794
circa 1800
1798
1797
1808
1808
1809
circa 1805
1807
1784
1791
1786
1800
1807
1787
1805
1790
1796
1800
1794
1800
1800
1800
1795-1805
1807
1792
1795
1800
circa 1808
1790
1807
1802
1795
1795
1790
1785-1795
1792
1802
1790
1799-1802
1785
1797-1804
1793-1803
hallmarked 1788
1795-1805 (original)
1785
1799
1806