Hard to tell, but from the pictures the receiver looks to be slightly rounded, and the barrel appears to be to heavy for an issue barrel. Either way, I'd say you did very well if you bought it for $219. No holes in the receiver ring, and the bolt has not been altered, and it does not appear to have been over polished to excessively as so many old sporters have. If it turns out to be a restocked NRA sporter, then you did very very well.

John