This doesn't really answer your question but to give you some more info - The F3 has 2 TV tabs in the back and 1 in the front. They were all monochrome (green) then a few years ago the rear ones were replaced with colour displays, but they can only be operated in monochrome (makes things a little tricky with 30 odd tracks on!) The front display is still the old tv tab (pilots dont break them anywhere near as often as clumsy navs
).
I think that the mono ones all went to the GR4 - but I could be wrong!