Illegal removal is not the case here. This firearm has a known history in my family and the finish is completely intact. No grinding, buffing, filing, fingernail clawing or tooth knawing to be seen. Simply cannot find a clear stamp. I put it under a magnifying lamp today and see what looks to be a possible ID that is poor at best. Found on the left side under the grip. Very broken and over spaced but looks like "8L81". Doesn't seem like a proper serial # to me but who knows???? Certainly not me.