Where is the serial number located on a Stevens model 940 16 gauge?

The serial number on a Stevens model 940 16 gauge shotgun is typically located on the underside of the receiver, just ahead of the trigger guard. In some instances, it may also be found on the barrel, near the hinge or on the bottom of the barrel's lug. If you're having trouble locating it, ensure the shotgun is unloaded and examine these areas closely.