If you google RG Owens rifle images you will see a pretty good sample of his work. I don't see anything that has either cheekpiece, comb or checkering like yours although I think most were produced in his early years. According to Petrov he went to Port Clinton, OH during the war and remained there until he died in 1959. I don't think I have ever seen any references to him doing custom work in the 1950's, but he could have. I remember when the heavy bbl L46 Sako was imported and I think it was post-1955, but I could be remembering wrong. I found a list of mfg. dates on this site -
http://thehunterslife.com/forums/showthread.php?t=14777 so you should be able to determine when your rifle was made.
