The Longines Legend Diver Automatic 39mm, reference L37644909, is a timepiece that combines vintage design with modern functionality. It features a 39mm stainless steel case with a thickness of 12.7mm and a lug-to-lug measurement of 47mm. The blue lacquered polished dial is protected by a scratch-resistant sapphire crystal with multiple layers of anti-reflective coating. The watch is powered by the Longines Calibre L888, a self-winding mechanical movement operating at 25,200 vibrations per hour, offering a power reserve of up to 72 hours. It includes an internal turning diving flange operated by a screw-in crown at 2 o'clock and is water-resistant up to 300 meters. The timepiece is completed with a blue rubber strap secured by a tang buckle.