PRESENCE | 40 mm | AutomaticDate display, self winding mechanical movement beating at 25,200 vibrations per hour, with a power reserve of approximately 64 hours. 40mm polished stainless steel case. Water resistant up to 30 meters. Scratch resistant sapphire crystal. Transparent case back. White dial with silver tone hands and index hour markers. Date display at 3 o'clock. Black calfskin leather strap with alligator style texture. Stainless steel tang buckle. The Longines Prsence