Hi, I picked up a 5-screw pre model Highway Patrolman that is in pretty good shape, with the exception of the stocks. The are quite beaten up, and I will replace them at some point. The S-series serial number puts the gun being manufactured in 1954-1955 per the S&W book. The stocks do not have a serial number on them, and I was wondering if the serial numbers were typically put on S-series stocks of that vintage. Could be the stocks were replaced previously. Thanks.