This IWC Da Vinci Moon Phase 36 (ref. IW459306) features the 35800-caliber mechanical automatic movement with an approximate 42-hour power reserve when fully wound; silver-plated dial; moon phase aperture at 12 o'clock; center seconds hand; and 36mm, stainless steel case on a dark blue alligator leather strap from Santoni secured by a stainless steel three-wing butterfly clasp.