Hmmm, I don't own a '70 or '71, so I'm still trying to figure that one out... :eeksmall: It looks like something to do with the windshield washer resorvior, but any plastic piece that old will have that yellow discoloration to it.....I still want to post a photo of one of my "mystery" pieces even though I don't know if I made a correct guess or not on the last item.