Brand: IWC (INTERNATIONALWATCHCOMPANY) International Watch Company Product name PORTUGUESE CHRONOGRAPH Portuguese Chronograph Model Number Ref. IW371617 Case Material SS stainless steel Belt material SS stainless steel Belt size Approximate wrist length [approx. up to 18 cm Dial Silver dial Glass Sapphire glass Specifications Mechanical self-winding movement (AUTO) Chronograph / Water resistant to 3 atm Power reserve: approx. 46 hours Weight: approx. 145g Case size Length of case (including lugs): 48 mm Case diameter (without crown): 41 mm Glass diameter: 38 mm Thickness: 13 mm Accessories IWC genuine IWC genuine box, international warranty card, instruction booklet. It comes with the box. Remarks Model released in 2020