I recently picked up a St. Etienne Berthier Mle 16 with a serial number on both the receiver and barrel. It is a FN prefix. I am not very familiar with these weapons but have never seen a serial number on the receiver before. Also the barrel is marked MF in a circle with no barrel date. I had heard that MF was a civilian proof mark. Does that mean they were made for the civilian market or was it a army contract and it is marked "N" at the twelve o'clock position on the reciever and barrel. It is all matching except the bolt which is marked with a L in a circle and numbered with a N prefix. Will post pics if needed but none on me at the present time. Thanks in advanced for any Info.