Re: crescent firearms
Well, Crescent was the company that really did make an awful lot of those store brands, but they also made guns with their own name on them. Their guns, under whatever name, were reasonably well made and moderately priced. But they were used, usually a lot harder than more expensive guns, and most Crescent-made guns today show that use.
Since Crescent spanned the black-to-smokeless powder era, the barrels on Crescent made guns may not be safe to fire with modern ammunition, and age and wear may render them unsafe with any ammunition. I would consider any of them to be relics and recommend against firing them.
I suggest Googling "Cresent Gun Company" for more info than I could possibly give you here.