Yes, but it is quite likely to be an Iver Johnson Champion if it is a single shot. I can only narrow the date of manufacture down to "1890's to 1960's" from the name alone and serial numbers don't mean much on these older trade-name guns. You may be able to get a pretty good idea when it was purchased from family members. I have an old 20 ga. single shot marked Cresent that looks exactly like the Excel. The Standard Catalog of Firearms states that Crescent Fire Arms made the Excel for Montgomery Ward & Co. of Chicago, Ill.
Crescent manufactured shotguns from 1888 to 1940. They sold a million utility shotguns that were "branded" by hardware stores and the like. Typical value is $85 to $150.
Plymouth was a trade brand shotgun made by Crescent Fire Arms Co and later by Davis-Warner Arms Co. It was distributed/retailed by H & D Folsome. Shotgun Markings also lists a hammer double barrel by an unknown Belgian maker and indicates the retailer was Spear & Co.
The current Barrett Firearms does not make a double shotgun. Exactly how is your gun marked?
I HAVE A LIST OF GUNMAKERS ,CRESCENT DID NOT MAKE A RICHMOND.THEY DID MAKE A RICHLAND , FOR A HARDWARE STORE BYTHAT NAME. IF MY LIST IS CORRECT,
In my opinion, nothing special. Crescent make many shotguns for various companys and hardware stores in the early years
No published data known to answer your question.