The Only Watch Patek is originally derived from the reference 5175 introduced in 2014 to mark Patek Philippe's 175th anniversary. Six pieces were sold to fortunate collectors for 2.5 million. Two years later the watch reemerged as Reference 6300G in white gold and priced at
link 2.2 million. The Only Watch Grandmaster Chime
link Ref. 6300A could be
link the watch's steely swan song.