As my old post kind of fizzled out, and I am starved for things to think about, decided to start a new topic. Getting ready to drop some folding paper on an M1. I've read all I can find on the model, specifically as it relates to serial numbers. The gun in question is in the 508000 range. It's a "late production" judging by the protected rear sight assembly, but has pin levers and a crossbolt stock. I have yet to see any other M1's this high in the range. ATII shows one in the 244000 range. By a staggering coincidence, I also see an M1A1 in the 508000 range. I am sure most of you saw the pics in my other post. I've had speaks with Newtommygunner about the serial. Just wanted as much data as possible to occupy me for the next eight or so months. Also, as curious to me as the high serial number, the gun seems to have no proof marks at all. Not even the "GEG" I would expect from the civilian inspector Geo. E. Goll. Thoughts? What are your M1 serial numbers?