Spencer Gun Co was a trade name retailed by Hibbard, Spencer, Bartlett & Co Hardware of Chicago. Their guns were made by a varitey of manufacturers, but the patent date on yours identifies it as a product of WH Davenport Arms Co.
Collins books might have something on the company
More information needed.
A shotgun made in the late 1800's
It was made by Crescent Fire Arms Company @ 1900. Spencer was a trade name used by Hibbard and Spencer Bartlett on shotguns made for them by Crescent. Seldom exceed 100 USD
The company that produced the Spencer rifle was the Spencer Arms Company, not the Spencer Gun Company, and they manufactured a slide action shotgun, not a single shot. It is possible that you have a post war conversion of a Spencer rifle, but not likely. It is most likely a low budget import from Belgium, marked to look like it had a better pedigree than it deserves. Value is minimal as a curiosity.
what is a remington 20ga shotgun patented 1891,1903,1904 worth?
Retailed by either Hibbard, Spencer, Bartlett & Co of Chicago (1855-1960) or Gray & Dudley Hardware Co of Nashville (1880-1930).
I have a 10 gauge spencer shotgun for sale ($2000.00) . Great shape. They are very rare. Tom 210 218 2834
Without more information, my suggestion is you take it to a qualified gunsmith for a safety check.
Yes
If patented in 1913 the shotgun is most likely was made before 1920. There is not really any way to get an accurate date without knowing more about the gun.