
Difference Engine No. 1
circa 1832
circa 1832
1775
1838
1771-1830
1788
1839 (original); circa 1988 (replica)
1846
1791
1770
1834-1836
1776
1793-1803
1849
1837
1794
1837
1834-1844
1837
1820
1782
1822-1840
1774-1831
1850
1787
1803-1828
1764
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
1771-1850
1790-1830
1840-1850
1830-1850
1801-1830
1771-1800
1822-1850
1771-1830
1846