John:
There are either signed or unsigned. There was also a 7-card promo pack (I think those are the ones numbered to 5000) sent to all sorts of Dealers and Hobby Media.
I'm curious as to how many unsigned Mantles he got out of the case. I don't think I saw he said any were pulled unsigned from the case either.
https://www.comc.com/Cards,sr,=1991+score+mantle~5c for a Mantle breakdown. I suppose I could check on EBay as well.
Rich