Bism Dive Demo Nitrox Optimus This model is a genuine diving watch that boasts the flagship "Dive Demo" series from Bism, a diving manufacturer that Japan is proud of. It is specifically designed for Nitrox (high oxygen concentration air) and has gained tremendous trust from professional divers and recreational divers alike. Bism is a brand that was created when the diving division of Bridgestone became independent. It has a unique atmosphere with a ruggedness and matte texture of metal that is not found in current wristwatches, so you can differentiate yourself from others even when wearing a suit, and it also goes perfectly with denim jackets and military wear. You should be able to create your own unique look by using it extensively outdoors. Price negotiations may be possible if you provide an offer. Please feel free to ask any questions. I can also provide additional photos. This is the only one available, so please purchase it as soon as possible. Belt Color: Black Accessories: None Scratches/Cracks: None CASIO CITIZEN One item remaining Limited edition Beautiful condition Anonymous shipping Limited edition Vintage