Longines Twenty-Four Hours

The Longines Twenty-Four Hours, reference L2.751.4.53.4, has a 47.5 mm round case in steel. The black matt dial has painted Arabic numerals and polished silvered hands. The case measures 15.6 mm thick and 58.3 mm lug-to-lug, with water resistance rated to 30 metres. A scratch-resistant sapphire crystal covers the dial, with several layers of anti-reflective coating on the underside. A black alligator leather strap with a calf leather underside closes with a pin buckle. The dial includes a date display and central seconds. The strap fits between lugs spaced 25 mm apart. Self-winding calibre L704.3 powers the watch, with a transparent case back.