...Of course, the barrels in question carry the Krupp name/logo, but that could in fact reference just Krupp's contribution of steel. A quick scan around the web turned up numerous guns stamped LLH by the Belgian firm Laurent Lochet-Habran...but I've not seen that mark on the few pre-war Berettas I've had the opportunity to inspect. Stamping would of course be determinative...
Without stamped barrels everything is speculation. We know Krupp was licensing their formulations. Who poured the steel, rolled it, etc. needs verification.
Pete