The serial number is on the side with sling swivel, I l remember part of it but it's 7??F , so it does have a letter on the stock , and only on one side , my main concern is the letter s on the barrel, I just want to make sure it's in 8x56 , the rifle it's self is not expensive, he will let me have for $250. My son wants one in 8x56 because someone gave him a bunch of ammo , thanks mike