1996 ASST. NO. UNKNOWN
Notes: The origins and details of this series are unknown to me. Many do not recognize that these figures are actually dated 1996 and have different cards from their initial release, many three years prior. Making it more challenging is that some of the figures are designated as Asst. E above the UPC, however, Asst. E was distributed in 1993 and the date on this card was updated to 1996. Fortunately, they can be easily identified by the inclusion of a rectangle in the top right corner on the front of the card that states: "WARNING: CHOKING HAZARD. Small parts. Not for children under 3 years.". This was not present in any other release.
I also can't be sure these figures were released together, but two things are certain, they were all released in 1996 and they are all re-releases or re-decos. Another interesting note is that Mr. Sinister's card has been changed from "The Uncanny X-Men" to simply "X-Men", so effort was made into updating these cards in some way. All the other figures in this series are titled "The Uncanny X-Men". Apocalypse and the original release of Wolverine 3rd Edition are the only figures in the series to not have any changes from the original release, though a variant of Wolverine 3rd Edition is included in this series. I have not found any other figures with the choking warning to indicate there would have been more figures in this series.
Since there is no Asst. No. to confirm the order this series was likely released, I numbered it as the final release of 1996. If information ever comes out to clear up the mystery, I'll adjust the site accordingly.