100 USD or so
No serial number records exist, but the company was in business from 1908-1915.
the value of a 1948 Stevens double barrel shotgun 16 gauge. Hammerless.
The Knickerbocker was made by Cresent, but under the Folsom House Brand. A great recourse for shotgun information can be found in a book called "The Golden Age of Shotgunning" by Bob Hinman. GK & Associates, LLC
What information would you want? Crescent made single shotguns from 1893 to 1930. If it has a large side hammer and damascus barrels, it would almost certainly be from before 1915. If it has fluid steel barrels and a center hammer (or is hammerless) then sometime after 1903.
No known sn data.
Chances are that your shotgun was a model 385k,or a 395K model shotgun made by Mossberg firearms company.
Known tradename used by various hardware/catalog stores on guns made for them by Crescent Firearms between 1900-1930.
There's a whole shelf of books on firearms in your library. Or you may find information on www.savagearms.com