Replica of the first Morse telegraph, 1835
1934
1934
1932
1933
1932
2000-100 BCE
1955; 1830
1932
1933
Before 1932
1990-96
1934
1932-1933
1933
1801-1892 (prepared); 1946 (element replaced)
1933
1933
1903 (original); 1982 (model)
1830 (original); 1967 (model)
4000-2001 BCE
1933
Before 1932
1950-1920
1971-1900
2000-1350
1933
June 1933
1972-3
1932
1945-50
1932
1932
1990-95
1932
1932
1932
1933
30 CE
30 CE
1859; 1986
1932
3500-1000
1933
1930 (original); 1984 (model)
1933
1932
1970-1900
1933
1933
1933
2686-2613 BCE