You're losing me. Are you talking about this post?
If so, it is stamped with the same cursive GS as Jan's post, and the ones on ebay. The ones on ebay come with packaging that proudly displays a block letter GS. I believe the equation GS = GS is pretty well proven. The packaging also suggests a connection to San Marco. So far no one has shown any post stamped GP, or demonstrated any connection between GS and 3TTT or GPM, other than the misreading of GS as GP, which we have now laid to rest.