I have a Meriden Arms Co pump shotgun. 12ga hammerless takedown. Top tang safety. Serial number 6xx. 30" plain Bbl, Full choke. Extra BBl assembly #'d 5xx. Rounded pistol grip stock with small side panels. The only markings on the gun are on the top of the barrel is -Fluid Steel Krupp Essen-. On the op-rod is 'Meriden Fire Arms Co. Meriden Conn. USA / Savage Patents Granted, Mar. 5, 1912'. Unfortunetly the stock is missing the butt plate and is cracked and missing a piece of wood at the head. The metal, at least the barrels, have been reblued. It does still shoot nicely though! Anyone have any info on a Meriden Arms Co pump shotgun?? I thought the KRUPP-ESSEN marking was interesting..