Longines Concas Diving Series Men s Watch The Water Ghost of Longines. Waterproof up to 300 meters, with a case diameter of 41mm. It features an automatic mechanical SW 1 movement, not the commonly available imitation 2824. The back cover is an original shell. Simple and stylish, suitable for both business and casual wear. It has a screw in crown, a double fold safety clasp, and a diving extension mechanism. The sapphire crystal has a multi layer anti reflective coating on both sides. Comes complete with full packaging, including a three in one case back, tag, and warranty card. Exclusive launch.