W70

Declassified British documents describe the Mod 1 and Mod 2 versions of the weapon as having three yields between , while the Mod 3 enhanced radiation version was estimated to have a yield of The Mod 1 reportedly had more yield options than the Mod 2 warheads. The Mod 3 was reportedly 40% fission and 60% fusion, with two yield options. The weapon weighed , and was long and in diameter. Mod 1 and 2 weapons were produced from June 1973 to July 1977, while Mod 3 weapons were produced from August 1981 to February 1983. 900 Mod 1 and 2 warheads and 380 Mod 3 warheads were manufactured. The last warheads were retired in September 1992. ==See also==