CASIO MASTER OF G - SEA GULFMASTER GWN-1000B This is one of the G-SHOCK "Gulfmaster" series from Casio. It is operating normally as of the time of listing. This item has a retail price of 73,700 yen, but is offered at 13,500 yen (including shipping). Everything in the photos is included. Thank you. Below is information from the manufacturer's website. MASTER OF G GULFMASTER This is a triple sensor equipped model from the G-SHOCK "Gulfmaster" series, designed for use at sea, one of the most extreme natural environments on Earth. In addition to the direction, barometric pressure, and temperature measurement functions essential for carrying out missions at sea, it is equipped with a tide graph/moon phase display. It also has a barometric pressure trend information function that indicates rapid changes in barometric pressure with the hands on the inner dial, digital display, and alarm. Furthermore, it is equipped with a radio wave reception function and Tough Solar, combining practicality. The design is based on the instruments and compasses of ships, evoking the sea, and the form is designed so that the watch does not interfere with ropes and equipment on board. The light and sensor buttons, which have important functions, are colored in blue and red to support intuitive operation. The large crown has a quick-lock mechanism to maintain water resistance, achieving both operability and a tough design. The Gulfmaster is equipped with important functions to challenge the extremes of the sea.