Inspired by the thrill of the racetrack, Citizen Eco-Drive introduces this Limited Edition Primo. Each box set features interchangeable leather straps and a unique caseback with the signature and racing number of Matt Kenseth, two-time Daytona 500® Champion. Production is limited to 5,000 worldwide. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B612.