Is it the one in the large pictures the gun in question? If it is and has a collet barrel busing it would be a transition 80 series nickel parts over run two tone. If it has a solid barrel bushing it would be a series 80 parts overrun nickel, and nothing special. If it had the Collet bushing with a 70;s rollmark and the FPS it would be interesting for a colllector.PS: With box and papers I would put it at 800-1100 dollar range at this time. It looks to be in 85-90% condition and the box and papers will get you closer to the upper end.