[Trivial Psychic]

If it's of any comfort, the product code (the number beginning with 367) and the UPC number are identical the numbers on the official item (I purchased my set straight from NECA during NYCC that year.) Just going off my previous experiences with KO items, usually those are details that bootleggers tend to ommit altogether or will be altered in some way.

Your item might be authentic...but as others have stated, could have been one that "fell off the truck" so to speak, or was rejected by the factory during final inspections. Neca didn't bother numbering these sets, so whether there were actually 3000 made, or 3000+ due to wash outs during the assembly process is anybody's guess.