That is a nice rifle and reminds me of the very first double rifle I ever owned. They could be twins.

I parted with my rifle many years ago, but you can see photos of it posted by our member, Dale, who became the owner.

http://forums.nitroexpress.com/showflat.php?Cat=0&Number=108125&an=0&page=4#Post108125

The similarity of its engraving to the one in the OP's link is remarkable.

Curl