Replica of the first Morse telegraph, 1835
1934
1934
circa 1840
1840
1842
1842
1842
2000-100 BCE
1893-4
1863-7
1841
1839
1841
1839
1843
1955; 1830
1840
1839
1839
1990-96
1842
1839
1930 (replica); 1834 (original)
circa 1842
1841
1839
1775-1799 (original); 1900-1907 (model)
4000-2001 BCE
1839 (original); circa 1988 (replica)
1705-1737
1870-1877
1840
1842
1839-1840
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1830 (original); 1967 (model)
1840
1840
1840-1841
1843
1843
1839
1840
1839
1839
1825; 1910
1840
circa 1840
1841
1839