The Audemars Piguet escapement

The Audemars Piguet Jules Audemars Chronometer With AP Escapement debuted with much fanfare at the 2009 SIHH. Deservedly, it came with the high frequency, lubricant-free AP escapement, which was unveiled in 2006, The beautifully finished movement has a stout power reserve and is C.O.S.C.-certified, but perhaps more importantly, the movement stands by the purpose of the AP escapement in the first place: improved accuracy.
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[@colsanjaybajpai5747]

Who’s this highly intelligent engineer who has given the singular dislike. Perhaps Audemars is below his standard of engineering???

[@dennisjones9044]

well it's been eight years and few are using it, imho it exceeded the point of diminishing returns, there are plenty of other movements out there that will give you the same chronographic results without rattling itself to pieces