Apr. 20, 1915, refers to the patent date of Patent No. 1,136,247 granted to G.S. Lewis and assigned to the J. Stevens Arms & Tool Co. of Chicopee Falls, Mass. This patent covers a hammerless double with coil-spring driven strikers, rather than internal hammers rotating about an axle. From the time of the patent until the Mid-1930s this action was used on a number of different Stevens, Riverside and Springfield doubles as well as many marked with a variety of "trade names." The gun of this design was introduced in 12- and 16-gauge as the Riverside No. 315 in the J. Stevens Arms & Tool Co. Catalogue No. 54, with a list price of $16.50. The plants of the J. Stevens Arms & Tool Co. were taken over by, as I recall, New England Westinghouse for wartime production during WW-I, and became J. Stevens Arms Co. Sometime after The Great War they were sold off to Savage Arms Corp. and continued to operate as J. Stevens Arms Co., a wholly owned subsidiary of Savage Arms Corp. J. Stevens Arms Co. continued to make this gun during the 1920s as the Riverside No. 315. By 1923 they introduced a slightly upscale version called the Stevens No. 330 --
The Stevens No. 330 came with a checkered capped pistol grip walnut stock, while the Riverside had a checkered half-pistol grip walnut stock. By 1925 the 20-gauge and .410-bore were added to the offerings.
During 1929, J. Stevens Arms Co. changed from using the Riverside Arms Co. name for their lower priced line and started using the Springfield Arms Co. name. Also, during 1929 they introduced the Springfield No. 311 --
which was a similar gun but with an uncheckered, some catalogues say “walnut” and some "walnut finish", stock. And, finally for 1929 J. Stevens Arms Co. began offering the Stevens No. 330 with a Jostam Anti-Flinch recoil pad and Lyman twin ivory sights.
For 1936, J. Stevens Arms Co. began phasing these Lewis action guns out and replacing them with guns with the action body marked 5100, or 5000 -- Stevens No. 530, Springfield No. 515, etc. In 1939, Savage added the Fox Model B to their Fox offerings with this insert in some of their Fox Catalogues
The Model B shared many parts with the 5100 action. Also in 1940, J. Stevens Arms Co. introduced a Tenite stocked version of the No. 530, the No. 530M.