IWC Schaffhausen Portugieser Tourbillon Rétrograde Chronograph

The IWC Schaffhausen Portugieser Tourbillon Rétrograde Chronograph IW394009 is a chronograph in 18-carat Armor Gold, its case measuring 43.5 mm across. The case stands 15.9 mm thick and carries a water resistance rating of 30 metres. Inside is the IWC-manufactured calibre 89900, an automatic, self-winding movement with 68 hours of power reserve. The dial sits under an arched-edge sapphire crystal with antireflective coating on both sides, and the case has a display back showing the movement. This is a flying minute tourbillon watch with a flyback chronograph and a retrograde date display, the hour and minute counters combined in a totalizer at 12 o'clock. The watch is fitted with a black alligator leather strap by Santoni. IWC Schaffhausen limits this reference to 100 pieces.