CORSO: A time-honored watch with clean lines and simple accents, this watch will never go out of style. Featured here in stainless steel with charcoal grey dial, rose gold-tone accents, sapphire crystal and date. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E111. Case size 41mm. Water-Resistance: WR100/10Bar/333ft (Swimming, Showering & Snorkeling). Sapphire Crystal. 5 year limited warranty.