Longines Concas Diving Series Men s Watch The Water Ghost of Longines. Waterproof up to 300 meters. Case diameter 41mm, featuring an automatic mechanical SW 1 movement, not the commonly found imitation 2824 on the market. The original case back is included. Simple and stylish, suitable for both business and casual wear. Equipped with a screw in crown, double fold safety clasp, and a diving extension device. Sapphire crystal with a multi layer anti reflective coating on both sides. Comes with complete packaging, including a three in one code, case back, hang tag, and warranty card. Exclusive launch.