Need some help, I recently purchased a Benelli 20 guage from a friend who inherited this gun last year. I am having trouble finding the history of this gun or any information. On the receiver it has: Benelli Armi-Urbing-Italy Saco Arlington Va. On the barrel it has; Canonnerie Manufrance. On the underside of the receiver it has: B0550 . In front of the trigger guard is the number 201. Any help would be great.