Welcome to the board. Hopefully you will stay around. You may learn a bit and contribute.
Rival is a known trade name of Crescent. The Rival was made for the Van Camp Hardware and Iron Company of Indianapolis, Indiana. They were cheap, utility guns when they were made, mostly selling for under $20.00. The barrels were produced in Belgium to a very low price point, usually under $2.00 for both tubes.
The gun in not worth restoration at this point. Do not shoot this gun without having it examined by a qualified gunsmith. In the state it is in, I would not trust black powder loads in it.
Your interest in old sxs guns is to be commended. As time goes on, you will learn what to look for.
Pete
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