WSO bezels are not compatible with cartel watches, not with MBW, and the best - even not with the retaining ring which WSO offers!
I ordered the whole set, and I tried it having all versions here. Without a modification on a lathe (OK, some experts would do it with a dremel, I know - but I am talking about a perfect working solution) it is not possible to get them together, if you want the bezel to turn by pressing it down as it should!
The WSO retaining ring is made of butter I think, 'cause you can bend it with your fingers. If I found it, I wil post a pic to show how it looks after a try to press it on a crystal.
But the bezel is made really good, very nice finish. I compared it to a gen, and the only difference is the depth of the teeth.
Also the MBW bezel won't work on a cartel retainer...if I remember it was too loose.
Hope this helps.