Nice Dan Wesson!
It's the Model 14-2. The Model 14-1 had the "porkchop" style barrels and the exposed barrel nuts. It looks like you've got the 6" barrel, which is nice.
You can use the Model 15-2 barrels for it, but you'll have to replace the front sight blade with the Model 14 blades in order to make it accurate. Enjoy!
Edit: If you want more information then you can shake a stick at, then i suggest a trip to the Dan Wesson forums. Nicest bunch of enthusiasts you'll ever meet.