Wow stunning !
Ringer is something that pops here and there.
So it's either something genetic with like 3-4 gene that need to make it
or
it's related to the incubation
What ever, this is one hell of a ringer. I wouldn't even call it like that.
Just something crazy. May be it was just placed weird in the eggs and part of the coloration didn't make it, or something that I can't understandmay be it will prove out one day, may be never.