Collectors Universe slab?
                    What does it mean when a coin is in a PCGS slab but the label is Collectors Universe and there's no grade or serial number? I saw this in the ebay auction below:
1993 WTC ASE
                        1993 WTC ASE
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They were supposedly recovered from the ground zero site and encapsulated by PCGS/CU in bulk as part of a marketing deal. There has been a lot of controversy over these as they basically were profiting off of the 9/11 event.
CU has also produced a couple other slabs as well such as gold dust from the SS Central America and some CA fractional gold. They have not produced anything that I have cataloged as production slabs, just Novelty slabs.