OK... contest entry... one of 2 known That's right, the slabbing company MISSPELLED THEIR OWN NAME!!!! The other: https://www.cointalk.com/threads/the-very-very-rare-accurade-slabbing-company.258079/
I wish I had the other slabs from that submission. I sent in two 1999-S silver proof sets. Just about every silver coin was mislabeled. I cracked the state quarters for an album from one set and traded the other set to an NGC member. Here is a description of the errors on these two sets. Both halves say Connecticut One Pennsylvania quarter is correct while the other says fifty cents Both Georgia's say New Jersey Both Connecticut's say Georgia One New Jersey's says Pennsylvania, the other says fifty cents Both Delaware's are correct..........Yay!!
Here's one I found looking on eBay 1909 cent https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/173840529811
Two can play that game*! #2 was featured here: https://www.cointalk.com/threads/the-ultra-rare-accurade-slab-now-population-of-2.281788/ (*technically I can't any longer as I sold it)