Being J. Stevens Arms Co., the gun would be 1920 to WW-II time frame. By 1928 their No. 330 was offered in .410-bore with a checked stock and a capped full pistol grip. The listings stay the same through 1933. The next Stevens paper I have is 1938 and the Stevens double is now the No. 530. As with Savage-era Fox paper the first to mention chamber lengths is 1938, and by then the .410-bores are chambered for 3-inch shells.