Casio G-SHOCK GR-B200-1A2DR GRAVITYMASTER WatchMASTER OF G AIR GRAVITYMASTER GR B200 1A This is a Quad Sensor equipped model in the G Shock Gravitymaster Series, designed for pilots working in harsh conditions. Its structure combines a carbon fiber reinforced resin case with a Carbon Core Guard that protects the module, offering shock resistance and fortifying the watch against vibrations. The resin that forms the bezel area has a three layer Carbon Fiber Insert structure, making it wear