@whatsonthewrist: A brutalist icon powered by refined mechanics. NB. This watch is a dupe. This video is for design inspiration dialogue 🚨 The original 1970s Royal Oak Ref. 5402 housed the ultra-thin automatic Calibre 2121 - just 3.05mm thick, with around 40 hours of power reserve. #AudemarsPiguet #RoyalOak #Calibre2121 #Genta #WatchTok