The #Rolex #Deepsea is definatley the biggest of Rolex watches i have to say, ref 116660 at one inch thick its a monster but does not feel that big on the wrist. Rolex deepsea is water resistant to 12000 meters with a gas escape valve on the side to release pressure from the watch at low depths hence the name and has unique design #Ring lock system which lets watch go so far down. A truly cracking engineered piece that i do love, totally different to its predecessor the Rolex Sea Dweller in every way. But if you love Rolex and Big watches its a perfect match as they do not produced a lot from Rolex on the big side. It does have a #Ceramic bezel as most new #divers #watches have these days hard wearing strong and great looking, also the date function at the 3 o clock which always nice to have a great stunning piece but not cheap !!