Replica of the first Morse telegraph, 1835
1934
1934
2000-100 BCE
1919
1955; 1830
1990-96
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
1919
4000-2001 BCE
1934
1839 (original); circa 1988 (replica)
circa 1919
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1830 (original); 1967 (model)
1931-06
1956-09
May 1919
18 Janury 1948
1919
1919
1953-4
1919
pre-1919
1970-1900
1919
circa 1919
1919
1919
1919
1970-1875
circa 1920; 1907
30 CE
30 CE
2686-2613 BCE
1859; 1986
1945-50
1919
1919
1916; 1929
1370-1350 BCE; 1931
1931; 250 BCE
1370-1350 BCE; 1931
2000-1000
1950-1900
1972-3
2500 BCE
1919
1919
1919