IWC Aquatimer Bronze Chronograph Watch IW379503 METAL: Bronze. MEASUREMENTS: Case 44mm, thickness 16.5mm. IWC rubber strap - full length, with bronze IWC buckle. Few scratches on the crystal. MOVEMENT: Automatic - not working, needs service. Ref. IW379503. Circa 2018. Watches are guaranteed to be in running order, if described as such, at the time of listing only. Watches have not been tested for features functionality, unless otherwise stated in description.