The first one has the correct upside SA3-41 marked barrel for serial SA number 3 throat 2 muzzle,but the leg is marked Toole and walnut stock 1/2' das and unsheriffed P with no circle. The second one is SA 12-41 and barrel is SA 5-52 G.I. birch stock 1/2 das unsheriffed P no circle with 2 throat- muzz.1+ I think the second one would be a better shooter. The stock fits tight!! I have been offered $1500 for the 1st. one!