You've no clue of the type of metal its is? I still think it looks like aluminum, maybe, just maybe pewter?? Go find a magnet and see how it reacts to this mystery item. We may have a long ways to go, being it has those weird lines on it. My pen is 5-1/2 inches long. I'm like only 2-1/2 inches off the first try. Not to shabby if I say so myself. ;-)