That hologram was used by JSA for a service called stamp of approval. It was for low end autographs and Scully and Reese would not have qualified at the $4 fee for this level. They were never in their database. That is the reason there is no number on the hologram.
They stopped this service a few years ago.
I doubt very seriously if those autographs are real or if they actually have that stamp affixed to the actual item.