The Citizen Corso collection, a combination of functional simplicity with a touch of timeless elegance is powered by any light with Eco-Drive Technology. This model features a rose gold-tone stainless steel case, sleek brown leather strap with coordinating black dial. Additionally a 1/5-second chronograph and date. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B642.