My father has a M-1 Carbine that he insists is a Universal. Even has the Universal owners manual. Looking in over, can't find any markings that state Universal, in fact, the only markings on it is the serial # V-*** and Plainfield Machine stamped on top of reciever. Is this a Universal? Worth keeping? Overall in good shape, states he may have never fired it. He is looking at parting with if I don't want. Thanks for any help.