Hi! I'm new here and I recently got a hold of a Belgian made FN A5 receiver. I cannot find any information regarding the serial number. It's a 12ga and the only markings on it are the FN stamp and "POL" under it where a Browning would have its serial number. On the side of the receiver is an import stamp that simply says "F.N. BELGIUM B.T.C. S.E.M. CA. 1907". If anyone could help me with this or give me any sort of idea on trying to date this receiver I'd be very happy. Thanks! Cody.