Hiya pastie.
Inside the stock is not so clear. On either stock actually. I think some of the cleaning oils have seeped down between stock and action. What you see on the outside is pretty much the same inside really.
I know that different cuts from different parts of a baulk can result in varying visual appearances but trust me if you put the lighter stock(thus is the one in question) in the pics up against another known walnut stock you will see some very very similar grain characteristics. Its quite a bland bit of wood though as I pointed out at the outset.
Thanks for your input
Dave