If it is a "SterlingworthS" it will be a VS gun and it should have the "SterlingworthS" marked on the bottom of the action.

I have one of these SLnE that I use for waterfowl. I had Mike Orlen open the chokes for shooting steel, even though it is not a damascus gun.

In my experience with this gun I might suggest pulling the locks and checking the firing pins. Mine was purchased with a broken pin and it took me a few attempts until I made one that would hold up.

Mike