IWC portuguese perpetual chronometer watch

The IWC Portuguese Perpetual Chronometer features the 51900 caliber automatic movement with tourbillon, perpetual calendar, and power reserve display. This 44.2mm x 15.5mm stainless steel case features sapphire crystal on both sides, displaying the tourbillon, perpetual calendar with retrograde date, and 3-day power reserve. Fitted with a leather strap and folding clasp, water resistant to 50 meters.