It is a J. Stevens Arms Co. G.S. Lewis Patent No. 1,136,247, granted Apr. 20, 1915, gun. The design was introduced by the J. Stevens Arms & Tool Co. in their last big catalog, General Catalog No. 54, as the Riverside Arms Co. No. 315 in 12- and 16-gauges with a checkered half-pistol grip walnut stock.
The company was taken over by New England Westinghouse for war production during The Great War, and became J. Stevens Arms Co. After WW-I NEW sold the company off to Savage Arms Corp. which continued to operate it as J. Stevens Arms Co. About 1923 they added the 20-gauge and introduced a slightly nicer version with a bit nicer checkered walnut with a capped full pistol grip stock called the Stevens No. 330.
By 1925 they added the .410-bore. Circa 1928/9 J. Stevens Arms Co. changed the name of their lower priced line from Riverside Arms Co. to Springfield Arms Co. and in 1929 they added a lower priced version, the Springfield No. 311 with a plain wood stock. In addition to these company brand guns, they made tens of thousands with numerous "trade brand" names on them up to WW-II.
Obviously the wood on the gun in question is after market.
People seem to go nuts for these old American .410-bore doubles, with dealers asking ridiculous prices for them.
Usually the receivers were color case hardened, but J. Stevens offered nickel plating as flaking off this one "trade branded" NEWPORT CN --
