... airliners.net states that before that, it was originally built for and used by the RAF as F.Mk.6 XF376. After conversion to FGA.9 standard, XF376 served with No.208 Squadron which was based at RAF Khormaksar, Aden. After RAF service, it was passed on to Chile.
However, David Griffin's excellent Hunter history "Hawker Hunter 1951-2007" states that J-747 actually was Hunter FGA.9 XF445... with XF376 becoming J-741
Anyhow, it was one of a batch of at least ten RAF FGA.9's that were donated to Chile after the Falklands campaign, ostensibly for "services rendered". They were delivered in 1982/3; What remains uncontested is that it was J-747 that was passed on to Israel in exchange for a Mystere IVA in 1989.