REF: 15720ST.OO.A027CA.01 Case diameter: 42MM Case material: Stainless steel Water resistance: 30 ATM Strap: Interchangeable blue rubber strap, stainless steel pin buckle, black rubber strap included (*Calfskin leather strap sold separately) ) Movement : Self-winding, CAL.4308 (manufactured in-house), approximately 60 hours power reserve, 28,800 vibrations per hour
