Gorgeous Scott, looks very much like a 1923 Webley & Scott Proprietary Grade 1 Hammerless. I used to own one just like it, and I regret I ever sold it. It would not hurt the value of the gun to have the finish and the checkering re-cut if you have it done by an absolute professional, matter o' fact, lets call it a "refresh" not a refinish, it'll ruffle less feathers. My favorite features on these Proprietary Grade 1's is the deep oak leaf engraving on the fences, followed closely by the sculpted top lever (it oozes class), and the carved "knuckles" on the forend. Very nice gun, hard to give it a value, I sold mine in the neighborhood of $5000 less than a year ago if I remember right, I believe my gun had just a bit more "condition" to it though. Anyways, enjoy the Scott in good health.
Cheers,
Dustin