Longines Watch Flagship Heritage L4.815.4.52.2. A subtle balance between the classic and the distinct, elegance is one of the hallmarks of Longines watches. It has been a pillar of the brand from the outset, and it always inspires the lines, shapes and materials of its timepieces. Expressed through the brand’s slogan “Elegance is an attitude”, this value forges Longines’ reputation and image around the world.