
Heaf test gun, Oxford, England, 1978
1978
1978
1976
(1962); 1982
1978
1976
1976
1986
1976
1977
1977
1976
1977
1977
2000-100 BCE
1903 (original); 1982 (model)
1978
1839 (original); circa 1988 (replica)
1977
1976
1978
1990-96
1978
4000-2001 BCE
1990-95
1977
2800 BCE
1977
1977
circa 3000 BCE
1976
1798 (original); 1977 (model)
2050-1750 BCE
1978
1977
circa 1976
1976
2000-1001 BCE
1976-1978
circa 1977
1977
1989-08
1978
1977-1978
1976
1978
1976-1978
1977
1978
1977
1977