Replica of the first Morse telegraph, 1835
1934
1934
1908
2000-100 BCE
1872 (original); 1909 (model)
1955; 1830
1907
1990-96
1934
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
1907
1705-1737
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1830 (original); 1967 (model)
4000-2001 BCE
1908
1908-1900
1971-1900
1907
1907
1907
1908
1907
1907
1908
1907
1908
1908
1907
2000-1350
circa 1920; 1907
1907
1908
1907
1907
1907
1907
1907
1908
1908
1972-3
1945-50
1907
1907
1908
1908
1990-95
30 CE
30 CE