As others have said it's a priceless piece of family history---(and you didn't ask about value) ---So here is a
reply from another forum from 2009 Re: SCOUT shotguns.
"The gun is what is known as a "Trade Brand Name" shotgun. Between 1880 and 1940 it was quite common and popular for wholesalers and
retailers to want shotguns with names of their own choosing on them to sell. The major gun makers were only too happy to meet this demand.
Guns with the name Scout were made by the following makers:
Crescent Fire Arms of Norwich,CT (1892 to 1932) if a sidelock hammerless double.
Iver Johnson's Arms & Cycle Works of Fitchberg,MA (1871 to 1993) if a single barrel gun.
J.Stevens Arms Co of Chicopee Falls,MA (1864 to 1916) on a Model 311 if a boxlock hammerless double.
All the guns were made for and sold by the Frankfurt Hardware Company of Milwaukee,WI."
ETA It appears that the name was actually FRANKFURTH Hardware. They closed in 1977, over 100 years in business.