OKAY!! 
This is just a T.C. Hawken variant and have not seen one of these for some time now. Suspect that there are quite a few out there and were discontinued. The last one I saw was back in the late 80's. They were finished a little bit fancier than the standard Hawken model, in mostly white metal. I will have to dig into my old catalogs to see when they were active. As far as loading, it's the same as the standard model. Value is hard to state as the condition is unknown. Bore condition would dictate the value. This Cougar is just one of many variants that T.C. produced. Sadly, at some point I suspect that they will cease to produce any sidelocks. ...
Be Safe !!!