Replica of the first Morse telegraph, 1835
1934
1934
1853
1955; 1830
1854
2000-100 BCE
1893-4
1863-7
1854
1853
circa 1854
circa 1854
1775-1799 (original); 1900-1907 (model)
1990-96
1853
1934
1854
1705-1737
1870-1877
1772 (original); 1919 (model)
1930 (replica); 1834 (original)
circa 1854
1801-1840 (original); 1901 (model)
4000-2001 BCE
1830 (original); 1967 (model)
1854
1870-10
1730; 1967
1872-08
1972-3
2500 BCE
1880-120
1860-1820
1870-1850
1871-1830
1915-1825
1990-95
1901-950
1800-1830
1801-1850
1800-1830
1066; 1876
1854
1854
1853
1945-50
1853
1853
1854
3000-1500
3000-2000 BCE