Is that grey an operational scheme? Not being too up on F-111 types, I don’t know, but it looks a bit more interesting than the usual green/brown schemes that most seem to be preserved in.
The Dept of Defence did what the MOD are good at, they upgraded the F-111’s with decent computers & avionics, together with overhauls & repaints (in grey) costing $$$$$ 😮
Shortly after, the fleet was retired to the Boneyard, although the Aussies know a bargain when they see one, a purchased more (F-111G) plus spares packages for years to come. 😉
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