Ceramized titanium is very rare. I think only around 50 pieces got out from the factory. I never have the chance to see in person, the Matt finishing & colour are very nice even from pictures online. IMO, the PP model you mentioned in your post is very different from bathyscaph. One is dress watch & the other is sport diving watch. Depending on your life style, if you need both, keep the 12C30 & get something else to trade for the PP!! Good luck!