Very interesting design but you don't show any of the things that would help determine whether it's a Spain. Need to see joint, shaft collars and insert, butt cap, bumper removed, and kind of wrap. Never seen that kind of inlay work in a Spain before....very intriguing, though. Looks to me more like something you might find in an old Helmstetter custom. Could be Meucci, too. He did some real intricate stuff like that early on.