I just picked up my first Mosin, a Finn M91. The pics below are from the seller. The barrel looks pretty good after running a bore snake through it. It is shiny with strong rifling. The barrel is marked SA, VKT, B, D. The serial number on the barrel, receiver and bolt match. There is a second serial number on the receiver, but in a different font. There is also a very faint A on the receiver a bit past the second serial number. It is hard to see in the picture, but the barrel also has a Belgian Liege proof. The stock has a cross canon with a Z in the middle. There is also a D on the buttstock. In front of the trigger is a V and K on the stock. The stock has two pieces. On the left of the rear sight, the numbers 4, 6, 8, 10, 12 have been crossed off. The numbers 3, 4, 5 1/2, 7, 8 1/2 are marked on the other side. I am very new to Mosins and don't know what all of the above means (some I have found on http://mosinnagant.net/finland/default.asp and http://7.62x54r.net/). Now, I need to get some ammo and take it to the range.