I have a 1900 Remington the letters are KEDY. I can find info on the KED 2 Strip damascus with ejectors. What does the Y stand for?

Also I would like to respond to the question about tightening up a double gun.I just had one done by Mark at Marks Born Again Bird Guns in Mosinee Wisconsin. Fair price,fast service,clean work. I have shot a couple hundred rounds (trap loads) through the gun since getting it back and no problem.