I'd go with het red at a guess there, too, for the pewter.
Again, though, until it sheds, it's really hard to call. They can change dramatically. I don't see woma, though, with all that blushing on the back. Unless you're talking about HG Woma instead of Woma.
Edit--
Just occurred to me, it might be a pewter het red woma, and the het red would account for the blushing and black back. I actually think it's a distinct possibility.