Looks like someone gussied up a Springfield No. 515 which the J. Stevens Arms Co. introduced in 1936. Does it have 5000 stamped on the right side of the frame?
J. Stevens introduced this new action with internal hammers rotating about an axle, replacing the G.S. Lewis action with coil spring driven strikers that they had been using since shortly before WW-I. The G.S. Lewis action was used on the Riverside Arms Co./later Springfield Arms Co. No. 315, the J. Stevens No. 330 and the 1929 introduced Springfield No. 311 as well as numerous "trade branded" guns. From mid-1932 until WW-II all these J. Stevens and Springfield doubles were offered with a non-selective single trigger option.
With this new action the J. Stevens gun became the No. 530 and the Springfield No. 515 while they continued using the G.S. Lewis action on the Springfield No. 311 and "trade branded " guns to WW-II. Pretty quickly after the introduction of the 5000 action they changed from using the two-piece top-lever and spindle as on your gun and went to a one-piece top-lever and spindle and the frames were stamped 5100.
For 1939, Savage Arms Corp. took the internal parts of the 5100 action, put them in a bit nicer profiled black gun metal finish frame with a bit nicer stock and introduced the Fox Model B --
1939 Flyer introducing Model B.jpg
Threaded Mode