Sadly, no. All manufacturers used the same serial number system. Starting out with no letter suffix until they reset the serial number counting. For instance, you will find rifle 1500a from Steyr, Oberndorf, Sauer, etc. And to make things worse they repeated the serial numbers the next year. So there is a 1500a from Steyr, Oberndorf, Sauer, etc from 1940, 1941, 1942 and so on until factories ceased production, were captured or otherwise had to stop.