IWC Big Pilot Heritage bronze and leather automatic watchStyle No. IW501004Deployant claspBronze case, calfskin leather strap, 52110 calibre, WC-manufactured movement, 168 hours power reserve, frequency 28800.0 vph (4.0 hz), 31 Jewels, côtes de Genève perlage, soft-iron inner case for protection against magnetic fields, 7 days power reserve, power reserve display, date display, sapphire glass with convex, antireflective coating on both sides, pellaton automatic winding, central hacking seconds, Arabic numbers, hour/minute/second luminescencent handsCase diameter: 46.2mmWater resistance up to 60mMade in Switzerland