IWC Schaffhausen Iw394005 Portugieser Tourbillon Retrograde Chronograph

The IWC Schaffhausen Iw394005 Portugieser Tourbillon Retrograde Chronograph is noted for its 43.5mm case size, with some sources describing it as substantial and a "platinum beast." Reviewers highlight the retrograde date complication, though some find its small markers difficult to read precisely, requiring manual adjustment for shorter months. The watch features the automatic caliber 89900 movement, which includes a tourbillon and chronograph functions. Some owners perceive this model as a departure, leading them to explore other watchmakers, while others appreciate its engineering and the hypnotic tourbillon. On balance, owners and reviewers appreciate the intricate engineering and tourbillon of the IWC Schaffhausen Iw394005 Portugieser Tourbillon Retrograde Chronograph, despite some finding the retrograde date display challenging to read precisely.