I think I'd go with Akro slag. Maye pelt but pelts are usually feathered pretty good, not always. I doubt MFC. MFCs usually have a good swril to them that often forms a #9 when viewed from the right angle. Master didn't make slags. You haven't showed many masters but they are fairly common. MFCs aren't that hard to come by either. I'll dig up some newer ones and take pics.