Pease's page on Castellos includes a lot of #10s and he has both an OA as well as a really nicely grained one that I'm jealous of.
For some reason, along with the 55 and the 84, the defining shapes (for me) aren't being made any more. They have the same number, but they ain't it. The #11 I have isn't a real #11 a la
I'm convinced they never made more than a couple of real #11s. Here's mine, which they seem to produce a lot more of today.
If anyone sees an older-style #10 either with good grain or with an OA finish, you just let your huckleberry here know. The new ones don't appeal to me.