I am confused by the prototype holograms on the various 1991-92 Babe Ruth sets by Gold Entertainment, of Paterson, NJ.

Can someone explain exactly how many different prototype holos there are, and what they are ?

I have seen one for "The Called Shot" but one set seems to have 5 different holos as part of the regular set. Are there prototype versions of each of these 5 ?

It looks like there are prototype versions of at least the first 3 holograms in this set-- blank backs with the Gold Entertainment stamp

But the set itself seems to have 5 holograms, so I wonder if there are prototypes of # 4 and 5, as well.