Taking design cues from classic pilot watches, the Ace Aviator 45mm features a detailed mechanical face, chronograph, tachymeter features, and a premium calfskin leather strap with visible stitching. Case Size: 45mm Features both a chronograph and tachymeter feature to keep you up to speed and keep up to speed with your life Check the day of the month at a glance Luminova filled indexes and an intricate skeleton dial