Crescent shotguns were indeed the common hardware store gun of the era.
They were made for and under a large number of trade names and all the guns were pretty much the same.
Crescent made single shot hammer guns, double barrel hammer guns, and double barrel hammerless guns
These were the cheapie guns of the era but were actually pretty good.
Better than some of the current 'furrin' guns being offered on the market.
Look to see if the barrels are marked 'Armory Proof Steel' and 'choke bored'.
If they are, the barrels are made of fluid steel and safe with light load smokeless powder shells, 3 1/4 dram 1 1/8 oz maximum though I have shot 3 3/4-1 1/4 oz shot loads through one, I can't recommend it.
Choke boring was a form of full length taper choke that was popular at that time.
Unless the taper is specified, the guns will shoot an extremely tight, full choke pattern.
I have hit and killed flying pheasants at 50 to 75 yards with these guns and 1 1/8 ounce number 6 shot.
The guns are impressive on their patterning abilities.
If the gun has damascus barrels I wouldn't recommend shooting the gun, even with blackpowder loads unless a gunsmith has check the gun out and pronounce it safe to fire.
This means having the barrels Magnafluxed and visually checked for flaws in the steel.
Most of these old damascus guns have had very little care since they ceased to be used on a regular basis and rust and negligence have caused the damascus barrel steel to become somewhat unstable.
Damascus barrels may be bright and shiney but still be unsafe due to corroision in the welds weakening the barrels.
Crescent guns were very good products for the era in which they were used.
Today, they make better wallhangers than everyday shooters.