
Difference Engine No. 1
circa 1832
circa 1832
1838
1788
1839 (original); circa 1988 (replica)
1846
1791
1834-1836
1793-1803
1849
1837
1794
1837
1834-1844
1837
1820
1782
1822-1840
1850
1787
1803-1828
circa 1840
hallmarked 1788
1843
1795-1805 (original)
1821-1831
1849
1955; 1830
1842
1805
1796-1826
1800-1830
1849
1796-1797
1796-1798
1780-1850
1790-1830
1840-1850
1830-1850
1801-1830
1822-1850
1846
1780-1850
1807
1790-1840
1780-1850
1842
1785
1790-1819
1790-1819
1790-1819