Solid steel case with high quality durable Vulcanized rubber strap Traditional strap on with engraved buckle Polished rotatable pinion bezel, circular slide rule controlled by left crown Quartz (Battery-operated) watch mechanism Screw-in crown Calendar : Dial aperture Solid Steel Back with sapphire crystal clear front glass All the appropriate Breitling markings and wordings Fully Functional Chronograph subdials Fully functional working and able to adjust Weight and feel very close to the original