James, actually a Browning Auto-5 chambered in 16ga. with that serial number would have been made sometime during 1934. A Browning A5 from this time period would have actually been produced by Fabrique National (FN). A Field Grade or Grade 1 A5 in 75% condition could be worth about $300. A small premium would be added for those with a solid rib or vent. rib barrel.
Note: You'll want to have the chamber on your A5 checked by a gunsmith. Pre-WWII A5's in 16ga. could be chambered for 2 9/16" shells. This is much less desireable since modern shells start at 2.75". If you want the Browning Service Department can modify your A5 to accept the 2.75" shells. Also, early A5's with the safety mounted in front of the trigger guard are not as desirable as there are potential safety problems inherent in the design.
Hope this helps!
Steve Mace