Announce your arrival with style when you sport this titanium chrono. Key details for this 1-second chrono that measures up to 60 minutes include 12/24 hour time, date, luminous hands & markers, and sapphire crystal. This rugged titanium black ion plated model features a 43mm screw-back case and foldover clasp with push button, and is 100M WR. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B612.