Where is the serial number on a 16 gauge single barrel Crescent shotgun?

The serial number on a 16 gauge single barrel Crescent shotgun is typically located on the underside of the receiver or on the tang, which is the part of the shotgun that connects the stock to the action. In some models, it may also be found on the barrel, often near the hinge or where the barrel meets the receiver. If you're having difficulty locating it, ensure the shotgun is unloaded and inspect all accessible areas carefully.