Vaughan, GI Joe also had radar-type stuff. You can just about see it in this shot:
That's a great pic! Oh, I wouldn't mind that piece of kit!
That's the early seventies, Adventure Team solar communicator set - those panels were re issued fairly regularly with other sets including vehicles like The Trouble-shooter, and were black or silver in colour, or color, as GI Joe might say!
'You must have taken that last summer, Jim.'
LOL! I think it might have been two years ago! I've never used the pics, and had forgotten about them until I read this thread. (The sub title - Prints on backside still makes me smile! : ) )
Glad to be of help, Vaughan! I'll be posting some of the stuff you inspired me to when I get a chance!