yes to your post. It is awesome.Hi Frankie. You didn't mention whose post you are referring to, so I'll assume your question is related to my Brooks Colonial.
The wood is hard maple. The forestock is fairly plain with only minor curl. In the lock area through the wrist it starts some transition with more curl and the "interesting" pattern which intensifies in the buttstock.
If someone knows for sure what causes this pattern I'd love to know. I've examined a lot of online pictures and can't find anything that matches. Best I have come up with is crotch wood and/or in combination with spalting and/or burl.