With this Citizen Promaster NY0086-16LE Marine diving watch, you'll be fine on or under the water. An extremely accurate, automatic diver that is guaranteed to be close to 200 meters. This Citizen diver is therefore equipped with an ISO 6425 certificate and that means that it has been extensively tested for water resistance. Only a few watches/watch brands have this ISO certificate. Diver with ISO 6425 40-hour power reserve Luminescent hands and indexes The Citizen Promaster NY0086-16LE has an automatic movement. So you never have to replace this diver's battery. The crown is screwed but also the caste base plate is screwed. The Citizen Promaster NY0086-16LE Marine has hardened mineral glass and a 42 mm cabinet diameter. Of course, this diving watch has a diving ring. This watch comes in a very special diving bottle watch box. The ISO 6425 certificate also means something, read more about it here.