It would be somewhere between 1893 and 1930.
What was the question?
1900-130 or so.
0-75 bucks
Crescent made inexpensive "working" firearms 70-100 yrs ago
50-150 USD
@ turn of the century plus or minus a few decades
the Victor line of shotguns were made by Crescent Firearms Company, circa 1904-1920 Crescent was a sub contractor for many different shotgun distributors........... Crescent firearms were not high on collectors list..................
Around 1892 Crescent firearms manufactured shotguns under a variety of names. In 1930 H & D Folsom Arms sold their Crescent Fire Arms company to Savage Arms and Savage combined Crescent with Davis Warner Arms Corp., as Crescent-Davis Arms Corporation. Your shotguns value, in good condition, is about $150.
if its a single shot, then 75-150, a double barrel possibly 300
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Basically, you can't. AFAIK, no definitive history has been written on Crescent. They built utilitarin firearms, that weren't that expensive to begin with. If you had one NIB, it might be worth 150 USD.
Victor shotguns were made by crescent firearms from 1904 to 1920. You can assume your shotgun is at least 90 +/- years old.