308 REMINGTON AMMO FUNDAMENTALS EXPLAINED

Would any of you Remington guys understand how the earliest Wingmasters as compared to types made later on?KC but the wrong way up it suggests CK. not even stamped all of that nicely. In terms of the rest of the serial on the opposite , its S656868V. Way more good quality in the wingmaster. Any help on the day of the new just one? I think I acquire