The Savage Model 220 B was introduced in 1959 and made until 1965. The 220 B differed from the earlier Model 220 in that the 220 B had a rotating hammer versus the coil spring driven striker of the Model 220. Some of the early 220 B marked receivers actually have the coil spring striker. The Model 220 B was made in 12, 16, and 20 gauges and .410 bore with 26-32" barrels and various chokes.
The J Stevens Model 335 was an entry level gun that was introduced in the 1909-10 time frame and continued in production until 1929. It was offered in 12 and 16 gauges with 26-32" barrels. Your specimen was made in the 1920-1929 time frame based on the J. Stevens Arms Company name which was adopted when Savage Arms Corporation purchased the J. Stevens Arms and Tool Company in 1920. Based on the serial number, I would guess that it was produced in the latter years of the production.
No records are available to give an exact year of manufacture.