PGM100 Signature Location
Question about the original PGM100 (not the reissue). I've seen some signed by Paul on the electronics cavity cover, but I've seen others that don't have the signature on the electronics cavity cover. Initially I thought maybe the ones without the signature once had it but perhaps it rubbed off over the years, but I recently picked up an unmolested mint original that doesn't have the signature and it still has the clear plastic on the cavity cover (although partially peeling off from age).
Were all the original run (non reissue) PGM100's signed by Paul, or just some?
If they are supposed to be signed by him were they all signed on the electronics cavity cover or could the signature be found elsewhere? (i haven't taken the guitar apart to check various places)