The IWC Portugieser Tourbillon Mystère Rétrograde, model IW504402, has an 18k rose gold case with a transparent case back, and a dark brown leather strap with a deployant buckle. The watch features a silver-plated dial, a convex sapphire crystal with anti-reflective coating on both sides, flying minute tourbillon, retrograde date display, and 7-day power reserve. The case measures 44.2mm. It has 44 jewels and mechanical movement with Pellaton automatic winding IWC-manufactured calibre 51900.

Limited edition of 250 watches in 18k rose gold.