I just picked up an InterArms Mark X in 308 Norma Mag. The gun was given to the friend of a friend by his grandfather in 1981 and has been sitting in a closet gathering dust since then. What I'd like to find out is who made the gun. Does anyone have a book showing which manufacturer made a specific rifle by the serial number? The wood has a couple of very minor scratches and dings, bluing and bore look perfect. She sports a Leopold 4 power scope mounted on a Redfield Jr. base. I paid $425 for it, hope I didn't get ripped off. The serial number is 32603, the barrel is 62.5 cm long. See attached photos.