I inherited from my grandfather a Savage Fox Sterlingworth 12 gauge double barrel shotgun. I was just 12 years old when he allowed me to shoot it (1958) . I would like any help you can give me on the date of manufacture. Here are the specifications:

Serial Number 136152 - on barrel; stock; forearm and trigger guard
28 " barrels
Walnut stock and forearm
Marked on barrels as: Savage Arms Corporation Utica NY USA and Special Alloy Forged Steel
No model number nor shell size markings(although it is 2-3/4")
Fox Sterlingworth on both sides of the receiver

Any help would be appreciated. Also curious t know how a Model B might be identified on the gun if at all.

Thanks