AP’s in-house 4401 automatic flyback chronograph movement. Audemars Piguet The sapphire crystal display case back is secured with a screw-down titanium frame. Underneath, an in-house caliber 4401 ...
It contains caliber 4401, Audemars Piguet's integrated flyback chronograph, introduced in the Code 11.59 collection in 2019, ...
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