Citizen Eco-Drive presents a bold and sporty 1-second chronograph that measures up to 60 minutes with 12/24 hour time date date indicator. Shown in stainless steel black ion plating with 12 diamond markers on the black dial, a foldover clasp with push button, and 100M WR. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number H500.