MBW cases (excluding engraved casebacks, which are usually fairly easy for a knowledgeable Rolex collector to spot as non-gen) are very good. In the case of bezels, I think you would need to upgrade to a gen if you want something appreciably better. And, even then, most could not tell the difference. If you want the most bang for your buck, replace the MBW insert with a gen, which is costly. I am pretty sure you will need to mod the MBW bezel (&/or cement the insert in) to make it fit