Longines has drawn on its heritage to create the Weems Second-Setting Watch, a mechanical timepiece with a mobile inner dial, and to pay tribute to Philip van Horn Weems, one of the pioneers of aviation. In 1927, the American captain developed an invention to synchronise a watch with the closest second using a radio time signal without moving the hands. Longines is now commemorating the invention of a simple but inspired system with a timepiece that combines elegance with performance.