[Blancpain Watches] ZF Factory Fifty Fathoms Series Collection Boutique Super luminous Wide case design Elegant sapphire bezel The originator of achievement diving The bezel mouth made of sapphire is the most valuable part of the watch The hardness of sapphire is comparable Crisp Point Weird Very difficult to handle To achieve the original aura, slim and powerful effect The yield can only be controlled around 3 to 5 layers The domineering side-leaked case is very exquisite in workmanship Every polishing or brushing 50 seeks you deserve