I recently came across a Winchester made M1 Carbine with a 7 digit serial number 645****. I don't want to discuss how much I paid for it but I'm starting to wonder if I was taken for a sucker. I have tried searching all over the internet to figure out when it was made and some sort of value but I have not been able to find any serialization information. From what I've read on other sites and posts I have gathered that it was made after 1945 but that's about it. Any help will be greatly appreciated. Thanks in advance! -Lara I can post pictures if needed.