
Difference Engine No. 1
circa 1832
circa 1832
1801
1801-1830
1788
1815-1825
1800-1830
1819
1829
1835
1785
1796-1798
1838
1805
1839 (original); circa 1988 (replica)
1844
1821
1801-1840 (original); 1901 (model)
1806
1793-1803
1840
1842
1837
1794
1837
1837
1820
1822-1840
1787
1803-1828
circa 1840
1839
hallmarked 1788
1795-1805 (original)
1821-1831
1837
1839
1826
1808
1799
1805
1796-1826
1800-1830
1790-1840
1837
1797-1804
circa 1800
1838
1790-1819
1790-1819
1833