Hi, sorry about the delay in responding..... ( I forgot ….) I checked 4 or 5 NOS moldings, It appears that there was a small blob of sealer applied to the base of the post on the NOS parts. It looks like it was the black "dum dum" putty type sealer but its rock hard by now. On two of the moldings it looks like it melted before it dried out, making a small mess on the back of the molding. In the 80's, these moldings were just packaged in the blue and white paper envelopes and there's a brown stain where the sealer was on the envelopes also...
Hope this helps, John