Cardiac pacemaker, London, England, 1961-1962
1961-1962
1961-1962
1830 (original); 1967 (model)
1961
1839 (original); circa 1988 (replica)
(1962); 1982
1962
1990-96
1961
1903 (original); 1982 (model)
1962
2000-100 BCE
1962
1962
4000-2001 BCE
1962
1962
1962
1962
1961
1962
1961
1961
1962
1961
1962
1961
1961
1962
1962
1961
1961
1962
1962
1961
1961
1961
1961
1980-1950
1961
1961
1961
1961
1961
1961
1961
1961
1961
1962
1962
1962