The asterisk stamps on the bbl are the choke designation - one star = Full Choke, two=Mod, three=IC, four=no choke.
You appear to have a $900 + (BBGV, in that condition) Military (long barrel version) Riot/Trench Gun there.
The 720 Military was similar to the Remington Model 11, and was made by Savage/Stevens in very limited quantities in the 69,000-90,000 SN range.
Your gun appears to be gennie, since the front sight's ramp mounted & is Ordnance Dept stamped.
Last edited by PetahW; December 5, 2012 at 10:00 AM.