The Citizen Promaster BN0151-17L Marine has a very nice blue dial and blue silicone watch strap. This diving watch has been extensively tested for water resistance and that produced an ISO 6425 certificate, which means that this diver is in any case guaranteed to be waterproof to 200 meters. Your bathtub or the local pool should be able to survive this dive watch smoothly < br > < br > Diver with ISO 6425 Eco-Drive luminescent hands and indexes the Citizen Promaster BN0151-17L Marine has an Eco-Drive movement that Energy extracts from light. With this watch you can be very active on or underwater because the movement has been extensively tested on water resistance. The Eco-Drive movement of the Citizen Promaster BN0151-17L even charges at minimal (art) light. You never have to replace the battery of this diver. The case measures 44 mm and the crown of this watch is screwed. The striking diving ring is perfect to use under water and the pointers and indexes are luminous. This watch comes in a very special diving bottle watchbox. The ISO 6425 certificate also means some, read more about it here.