The later version of the No. 520, sometimes found marked No. 520-30, that were the "riot" guns of WW-II and later, and are also found in hunting versions with "store brand" markings does not appear in any J. Stevens Arms Co. or Savage/Stevens/Fox catalogues in my collection. It does appear in my 1950 Savage/Stevesn/Fox parts catalogue as the Model 520A though --
