1952 Wheat With A Nice Obverse Retained Cud With Retained Interior Die Break

It is both, they cross reference, if you look at the bottom of each listing, the one I provided and the one tropicalbats provided. I did overlook the cross reference though, thanks tropicalbats.

RIDB https://cuds-on-coins.com/lincoln-c...k-1909-1958/

RCD https://cuds-on-coins.com/lincoln-c...09-1958-rcd/

I can see that it is a Retained Cud, but can only assume it is also a RIDB as those die cracks are partially obscured by wear. It's one of those chicken or the egg kind of things, where the question is whether the Retained Cud came first, the RIDB came first, or are they both from the same event. Could be the die break has yet to fully form, or maybe it was fully formed before the Retained Cud. Either way, my comment was to note that it is, for certain, a Retained Cud and thus that ANACS got it right.