Not an angel. It looks to be an early autococker. 1995 if I am checking the SN right. Not sure if its value, but it does look pretty good for its age. The trigger frame on it is one of the better of its kind, and it looks like you have an old dye barrel. The tank is unusable if I am reading the date correctly.
Autocockers are outdated in terms of technology, but they are still fun to shoot.