Longqin watch Comcas diving series, inspired by water sports, has excellent performance and elegant style. In 2019, Longqin Watch launched a brand-new Concass diving series of all-ceramic watches. All the watchcases are made of ceramic materials, with ultra-high hardness and wear resistance. Dumb-gloss dial, polished case, circular Satin ring, Dumb-gloss back trim with circular satin, the different texture of each component, the achievement of the overall style of the table bold and fearless. The watch is equipped with a one-way revolving ring and a rotary crown to ensure the waterproof function of 300 meters. This large three-pin model with date display window is 43mm in diameter and carries the exclusive automatic chain-up mechanical core of Longine Watch. It is equipped with a black rubber strap which can accurately adjust the degree of tightness to bring comfortable experience to the wearer.