
Difference Engine No. 1
circa 1832
circa 1832
1801
1801-1830
1788
1815-1825
1800-1830
1819
1829
1835
1785
1796-1798
1805
1821
1806
1793-1803
1794
1820
1782
1787
1803-1828
hallmarked 1788
1795-1805 (original)
1821-1831
1826
1808
1799
1805
1796-1826
1800-1830
1797-1804
circa 1800
1790-1819
1790-1819
1833
1790-1810
1835
1829
1790-1819
1808
1790-1819
1790-1819
1790-1819
1790-1819
1790-1819
1809
1790-1819
1790-1819
circa 1810
1834
1829