I just received a call from a hunting body. Seems that he just purchased a Browning s/s rifle in 470 Nitro Express. I diden't know that Browning ever built a s/s rifle but on the barrell it's marked Browning Custom Shop. Would this be built on a BSS frame?? And what would the value be on a rig like this, I'm thinking that he stole it at $1500!!!!!! Any information would be greatly appreciated.