IWC Schaffhausen Portugieser Tourbillon Rétrograde Chronograph

The IWC Schaffhausen Portugieser Tourbillon Rétrograde Chronograph IW394005 is a chronograph with a 43.5 mm case in 18 ct Armor Gold. The case measures 15.9 mm thick and carries a rating of 3 bar, or 30 metres. The blue dial sits under an arched-edge sapphire crystal with antireflective coating on both sides. Inside is the IWC-manufactured calibre 89900, a self-winding movement with a power reserve of 68 hours. A flying minute tourbillon and a retrograde date display accompany the chronograph function, and the rotor is finished in 18-carat 5N gold. A sapphire display back on the case shows the movement. The watch is fitted to a blue alligator leather strap by Santoni, with a lug width of 22 mm.