Pic for a Sunday. Top 6",2nd month production, 1959, M48-0 in it's numbered box, 2nd. 8 3/8" M48-0, 3 T's, from 1960, that lettered as a K-38, bottom early 1961 8 3/8", M48-0, also a 4 screw. The ammo is from 1959 and has no child warning. I don't think these in the 8 3/8" are as scarce as the K22 or the K38's with the 8 3/8" bbls. I also have a nickle M48-3, 8 3/8". Big Larry