That's a nice find. Congrats! It shoots rather hard too.
It's one of the early models. Not sure if it's the first or second. The last few years model had the cast trigger guard. Give the barrel a good cleaning and you'll likely find it's accurate with the right pellet. I've never had much luck with pointed pellets.
The BStaley mod will tame it's bark some and give you a lot more shots per cartridge set.Cheers,J~