+1 agree with sub4me. 2836-2's were stamped with exactly that, "2836-2" on the movement plate, but that can and has been cloned too. Many swiss movements, if actually real Eternas, are still dirty factory returns or refurbs because that's what they can get cheaply. More serviceable, yes, but only sure fire way to know and trust a movement is to have a gen swiss installed yourself. Or buy gen or used gen which I sometimes can't control myself and do.