This is the newest Citizen Promaster Marine with sapphire glass. This is a real diving watch. They have upgraded this watch. The earlier models came with a mineral glass. The sapphire glass is much more durable and scratch resistant. The watch is waterproof till 200 Mtr. (20 ATM) and has a screw down crown to assure this. The watch has a black color dial and diving bezel. The diving bezel goes only counterclockwise as it should with a real diving watch. The watch is automatic so no more batteries needed. The watch comes with 2 years international guarantee from Citizen Europe.