You can find information for the 16 gauge Worthington Challenger single barrel shotgun at most gun stores and pawn shops. Many of these stores offer free appraisals and have knowledgeable clerks.
Trade name, 50-100 USD
Not a thing
Not enough information to answer that question. Need to know the other markings.
Not enough information.
it will do alot
Utility grade shotgun, 50-100 USD or so
What is a single shot pump?
Numerous companies in many countries have made single shot 12 gauge shotguns.
what is a remington 20ga shotgun patented 1891,1903,1904 worth?