Of course there is no "NON RAYE" on a rifled barrel, because this means "not rifled"! "Express non Raye" was used from 1894 to 1924 on guns that took BPE cases with a round ball, destined for countries which even then thought a rifled barrel to be more dangerous than a smoothbore and required licensing, or to circumvent import restictions and heavy taxing by such countries. Some of these smoothbores were rifled later.