The Audemars Piguet Perpetual Calendar has been an important part of the Royal Oak collection for many years, and this version in black ceramic continues its development. Initially a 39mm watch, the Perpetual Calendar was increased in size to 41 mm in 2012. Likewise, its self-winding calibre 5134 is also based on its predecessor, calibre 2120, which was a little smaller. Today the watch is still very slim at just under 10 mm.
Clear dial indications, weeks of the year, no second hand
The dial is perfectly legible, with day, date, month, leap year and moon phase on four subdials, and a more unusual indicator for the week of the year on the inner bezel flange (rehaut). The moon phase in particular is a thing of beauty, with a photo-realistic moon. The black ceramic case and bracelet give the watch a distinctive, tough appearance that corresponds to the very high resistance of ceramic to scratching, ageing and thermal shock. The case has a water resistance of 50 metres.
The 5134 calibre is self-winding, and has a power reserve of 40 hours. It runs at the unusual speed of 2.75 Hertz, 19,800 vibrations per hour. No seconds hand.
Price and reference
The Audemars Piguet Perpetual Calendar Black Ceramic is reference 26579CE.OO.1225CE.01, price €94,100, inclusive of VAT.