The IWC Aquatimer Chronograph, model IW379503, has a bronze case and black rubber strap. The watch features a black dial, a convex sapphire crystal with anti-reflective coating on both sides, date display, luminescent markers, stopwatch function, and 68-hour power reserve. The case measures 44mm. It has 35 jewels and mechanical movement with automatic winding IWC-manufactured calibre 89365. The Aquatimer Chronograph Edition "Expedition Charles Darwin" in bronze is a tribute to the great naturalist, whose observations on the Galapagos Islands led him to fundamental conclusions about the diversity of species.