At the heart of the Portugieser Tourbillon Retrograde Chronograph Lewis Hamilton is the mesmerizing flying hacking minute tourbillon, located at 6:00 on the dial.

Source: https://www.forbes.com/sites/robertanaas/2023/09/21/iwc-schaffhausen-unveils-complicated-portugieser-tourbillon-designed-with-race-car-driver-lewis-hamilton/

That’s also the period when La Fabrique Du Temps founders Michel Navas and Enrico Barbasini started working together for Genta during the ‘80s and ‘90s, overseeing the minute repeater, tourbillon and high complications workshops.

Source: https://wwd.com/accessories-news/watches/bulgari-biver-genta-philipp-plein-watch-events-geneva-1235602778/