The AP Royal Oak Perpetual Calendar 26579CS replica (ref. 26579CS.OO.1225CS.01) is the blue ceramic perpetual calendar: case, bezel, crown and integrated bracelet in one deep blue, around a blue Grande Tapisserie dial with blue sub-dials. Audemars Piguet unveiled it in September 2022 as the first all-blue-ceramic Royal Oak, after the black (2017) and white (2019) ceramic versions. The weekday sits on the left counter, the date on the right, months and the four-year leap cycle at the top, and a moon phase on a starry disc below the centre, with week numbers on the blue inner ring. The case and bracelet are ceramic as listed; the caseback frame is steel-coloured.

Royal Oak Perpetual Calendar 26579CS Specifications

• Reference: 26579CS.OO.1225CS.01
• Collection: Royal Oak Perpetual Calendar (ceramic)
• Case diameter: 41 mm
• Case thickness: 9.5 mm on the genuine
• Case and bracelet: blue ceramic (genuine clasp: blackened polished steel)
• Dial: blue Grande Tapisserie, blue counters, blue inner ring with week numbers, white applied hour markers
• Functions: hours, minutes, day, date, month, leap year, astronomical moon phase, week of the year
• Movement: clone Cal. 5134, automatic; calendar displays reproduced and set by correctors; function video on request
• Power reserve: about 38 hours (genuine Cal. 5134: 40 hours)
• Water resistance: 20 m (not for swimming)
• Factory: APS

26579CS Blue vs 26579CE Black vs 26579CB White Ceramic

The three ceramic perpetual calendars share the 41 mm case and the genuine Calibre 5134 with 40 hours of reserve; the colour scheme is what changes. The 26579CE is black on black, the 26579CB pairs a white ceramic case with a blue dial and pale counters, and the 26579CS is blue from bezel to bracelet. The 26574 carries the same calendar in a metal case. Choose the blue 26579CS for the boldest look, the black for something quieter, the white for contrast between case and dial, and the metal 26574 for a classic finish.

How water resistant is the ceramic Royal Oak Perpetual Calendar clone?

Treat it as splash-resistant only: the genuine 26579CS is rated to just 20 m, so keep it away from swimming, showers and the pool.

Will the moon phase on the 26579CS replica stay correct?

Only once it has been set: on the clone the moon, weekday, date, month and leap-cycle displays are reproduced and moved with small recessed pushers on the case flank, so after the watch stops you reset them; a function video is available before you buy.

Other Royal Oak Perpetual Calendar versions in stock: a black ceramic 26579CE, the white ceramic 26579CB with a blue dial, the 26574OR with a blue dial in rose gold tone and the steel 26574ST. See the full AP Royal Oak replica collection.