It's a 5200 with a 4900 top cover. It don't appear to have a front reinforced case and has a 5200/4200 type tank on it. The recoil is the early style as well.
Your probably right Mark. It had me wondering, cause you don't see the olive green cover often being used as a replacement. The saw obviously has the 3 screw top cover mount also. My older 5200 & 4200 also, have the 1 screw cover. If some of these saws could talk..LOL The life they have had, and cobbled back to life, to keep on working.
Gregg,