IWC Schaffhausen Big Pilot Annual Calendar Spitfire Automatic Stainless Steel & Calfskin 46.2MM Slate Dial Watch. This 46.2MM watch features a stainless steel case housing an IWC-manufactured self-winding automatic movement and transparent case back. The slate dial features white luminescent hands, arabic markers, and small hacking seconds including annual calendar with month, date, day, & power reserve display surrounded by a smooth bezel. Sapphire glass, convex, with anti-reflective coating on both sides. Glass secured against displacement by drop in air pressure. Screw-in crown. Height 15.3mm. Brown calfskin leather strap with folding clasp. Strap width 22 mm. Water resistant up to 60 meters. 7-Day power reserve of 168 hours.