Originally Posted by
memorabiliaunlimited
holograms have changed from being larger and odd shaped, to little circles, to the rectangular/circle shape they have now, and even the design and layout of the current shaped holograms have changed. older designed holograms, if laying around, will still be used (i have seen the little circle ones used on more recent items after they changed to the rectangular shape), and i believe this is so they are all used and do not end up in the wrong hands.
i am pretty certain that anything truly authenticated by MLB will have a code that can be entered in their database for verification. i have never seen an MLB hologram purporting to authenticate anything that did not have a code that could be verified in the MLB database. if you had a photograph of the hologram you referenced in your post i could provide further information. can i ask what the item was? i believe MLB uses different holograms for items that are licensed by MLB but not used or autographed (i have seen different style MLB holograms on things such as unsigned photographs).