
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1791
1794
circa 1800
1798
1797
1808
1808
1809
circa 1805
1807
1784
1795-1810
1791
1786
1800
1807
1787
1805
1790
1796
1800
1794
1800
1800
1783-1800
1800
1795-1805
1807
1792
1795
1800
circa 1808
1790
1807
1802
1795
1795
1790
1785-1795
1792
1802
1790
1799-1802
1790-1810
1785
1797-1804
1793-1803
hallmarked 1788
1795-1805 (original)