506R. Browning -Mod. Lightweight Double Auto – 12ga. Semi-Auto Shotgun – w/24” Raised Double Rib Barrel w/Bead Sight & Poly Streak Adj. Choke – Velvet Gray Finish – w/Checkered Round Knob Pistol Grip Wood Stocks w/Factory Double Auto Butt Plate – Mfg. 1952-1956 w/67,000 Total Production