I have looked at rifles below 6000 range and both of these rifles are exactly the same in all respects. Why would both of these rifles be stamped U.S. NAVY neatly in exactly the same spot on the left side of the receiver just above the stock line. I have been looking on the internet for 6 months and no one has mentioned a wartime 65 marked as such. I guess they may be Marine contract and were given to the Navy. I do now that the Navy stamped many rifles on the stock like the 03 Springfield. I do believe that the serial number range went above 10,000 for the Marine contract. It is a oddity, but there are a lot of undocumented things about Model 65 rifles. Thanks for the reply, I was hoping someone would. I have been a military gun collector for about 60 years. I also have a beautiful 1922 M-2 Springfield and other military .22s. Thanks again an looking for your reply. Regards 10XXX.