That appears to me an original Trim ring, but as noted the studs look too long, if it is original it will have a very small cast in part number on the underside of the rear mating flange surface. If you are certain the hood and trim ring are original start looking for modifications to either the hood flange inset holes, or that possibly one or more of the studs have been replaced and put in a slightly off position, proper placement was highly criticle in getting them to work with the rest of the studs. Even when all was right these hoods/rings did not fit perfectly, there was a bit of slop in the gaps around most originals I've looked at.