Okay, so I just bought a K98k stock off GunBroker for a future K98k rebuild. I ordered one that was supposed to be unmarked, but something looks off about it on the butt. It looks to me like the left side of the butt has been sanded to remove most of a serial number (there still appears to be traces of it), and then refinished. Are my suspicions correct, or am I just being paranoid?