I believe the 1915 patent date means the gun is identical to the Stevens 311 series. Numrich Gunparts at the related link should be able to help you.
The Double 12 gauge hammerless Riverside Arms shotgun, particularly with the patent date of April 20, 1915, can have some collectible value, but it largely depends on its condition, rarity, and market demand. Generally, such shotguns can range from a couple of hundred to over a thousand dollars. To get a more accurate appraisal, consider consulting a firearms expert or checking recent sales of similar models in gun shops or online auctions.
Hammerless
I have a 12 gauge shotgun with the numbers 4041 on it. It has a double barrel and double trigger and hammerless. Could someone tell me what year it was made?
50-150 USD
riverside arms co. split single shot gun
Try gunstocksinc.com
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Pedretti
any one with information or pics on peerless 12 gauge double barrel hammerless with 272562
Value will most likely not exceed 100 USD.
the value of a 1948 Stevens double barrel shotgun 16 gauge. Hammerless.
Seldom exceed 150 USD