I've seen it on some Robusts as well, Wingshooter. More recent ones, IIRC. But that's a bit like saying that I've seen it on all Ithaca doubles I've looked at. It still remains the exception rather than the rule in the wider world of both French doubles and American classic sxs. Nothing relative to choke was ever required on French shotguns, as it was on British shotguns for a fairly long period of time.