"XW-50X1-Y3" . . . . . "XW50X1, (-Y1 ?)" . "W50" . "W50 (nuclear warhead)" . . "W-50" . . . . "W50 nuclear warhead" . . "W50 warhead" . "W50 (nuclear warhead)" . "W50, -Y2 or Y3" . . "XW-50" . "XW-50X1-Y2" .