(...) Yes it does exist. It was factory painted to match the wing. It's from set 310. I have a picture of that set MIB showing both parts with red edge paint. Gary Istok also mentions it: (URL) to me is the years Gary mentioned. The plate you (...) (21 years ago, 1-Feb-04, to lugnet.cad.dat.parts)
(...) Thanks Clark! Too bad that geocities.jp link is dead. That would have been so much easier to tell if the part had been red... Well, I think it is ABS. No sign of misforming, I'd say the stud logo is late 60's, higher and more modern than the (...) (21 years ago, 1-Feb-04, to lugnet.cad.dat.parts)