1918 River Arms 12 guage double barrel

The markings I can find on this gun says it is a 1918 River Arms, I can not find anything about it on the internet. My husband passed away and I am trying to find out the value. It belonged to his grandfather and has been in the family since day one. The gun has been well cared for and in good condition.

hello ..i'm wandering if mabey you have an old riverside/ Stevens house brand double,,try a search on "stevens double barrel shotguns" and see if yours looks anything close to them, or try "Riverside double barrel shotgun",if it's a stevens riverside we may be able to give you a better idea of the value,by cross refrenceing it with the stevens brand..,many guns from the early part of the century were made by 1 company and sold by many small stores or thru the cataloge and carried the store or distributor who sold thems brand name or trade name,,
bigcurt