Audemars Piguet
Royal Oak | 25594BA | yellow gold

Serviced by Audemars Piguet

Regular price


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Audemars Piguet
Royal Oak | 25594BA | yellow gold

Serviced by Audemars Piguet

Regular price


This Audemars Piguet Royal Oak Day Date 25594BA is an unusual combination of the iconic Royal Oak design and a seldom seen complication. Believed to have been produced for only a handful of years, the Day Date Moonphase 25594 remains one of the few Royal Oak references to house this practical complication, which undoubtedly proves itself useful on a daily basis.

The Day Date Moonphase

Shortly after the introduction of the original “Jumbo” 5402, Audemars Piguet experimented with a few mid-size versions of the design. These were meant to bring the Royal Oak to a wider audience, who at the time favoured more modestly sized wristwatches. In 1983, less than a decade after Gerald Genta’s sketch was turned into reality, Audemars Piguet introduced a Day Date version of the design, with the ref. 25572. Two years later, they improved the design by integrating a moonphase, with the ref. 25594. This was one of the first complications to be housed within a mid-size Royal Oak case.

Sized at 36mm, the reference was only produced for a handful of years. This example represents the earliest incarnation of the 25594, displaying a few distinctive features, from the flat “Audemars Piguet” signature to the stick hands. In many ways, this piece is reminiscent of the original Royal Oak pieces, and all the vintage appeal which they embody. In recent times, the balanced design of the Day Date Moonphase, reminiscent of the Quantième Perpetuel pieces from the brand, has captured the attention of collectors.

A balanced dial

The symmetrical dial of the Royal Oak 25594BA is rendered in a gold colour, which wonderfully complements the precious metal of the case and bracelet. With most examples displaying a white dial, this example is all the more unusual with its matching golden dial. It retains the more understated “Petite Tapisserie” pattern, forming the square and lozenge motif, as seen in earlier executions of the Royal Oak. Newer versions of the Royal Oak have since adopted the manufacture’s bolder “Tapisserie Evolutive” dial pattern, less faithful to the original design. 

The flat “Audemars Piguet” font is also reminiscent of the one found on the reference 5402, further imbuing this piece with a certain vintage charm. Two gold counters display the day and date in an intuitive way, at 3 and 9 o'clock. The moonphase stands out at 6 o'clock, with the dark blue colour of the midnight sky matching the blued steel hands found in the day and date subdials. Evidence suggests the dial was manufactured by Stern Créations, the storied manufacturer which also produced dials for the Patek Philippe Nautilus and the Rolex “Stella” models, among others.

Though the majority of pieces come with lume-filled hands, this particular example of the ref. 25594 features unusual stick hands, which is believed to only have appeared on the first generation of pieces.

A Yellow Gold Royal Oak 

An all-gold Royal Oak is a bit of a paradox. The Royal Oak was originally conceived as a luxury steel watch, yet its design and proportions render wonderfully when executed in yellow gold. Usually more susceptible to wear than its stainless steel equivalent, this 25594BA - with the BA standing for yellow gold - is extremely well-preserved, retaining its original lines, crisp hallmarks and a thick case. 

At 36mm in diameter, and only 9mm thick, this Royal Oak case is a beautiful twist of perspectives and size. Thanks to the slim profile of the case and bracelet, the ref. 25594BA hugs the wrist, in a way that is both supremely comfortable, yet distinctively elegant and characterful. Collectors have noticed that on account of the unique case shape of the Royal Oak, the mid-size versions wear much larger on the wrist than their dimensions would suggest.

This 25594BA comes with its original yellow bracelet and “AP” signed clasp cover. The blade-style clasp, which is found on all Royal Oak watches produced between 1972 and the mid-‘80s, is made out of white gold, as is confirmed by the hallmarks on the back. Having recently been serviced by Audemars Piguet, this example features a service crown, with the "AP" signature, ensuring the movement's waterproofness. It is also accompanied by its original, unsigned crown, which the previous owner requested to keep during the service. 

The Movement 

This Royal Oak Day Date 25594BA is powered by the self-winding calibre 2224/2825, based on a Jaeger LeCoultre ébauche. This automatic calibre features 32 working jewels and beats at a frequency of 28,800 VpH, while delivering 40 hours of power reserve. It features an oscillating weight mounted on an unlubricated ceramic ball bearing, with one segment of the weight made out of 21-carat gold.

The Set 

This Audemars Piguet Royal Oak 25594BA comes with an Extract from the Archives (to follow) and service paperwork from Audemars Piguet from late 2020. It is also accompanied by its original unsigned crown, which the previous owner asked to keep following the service by Audemars Piguet.

Brand: Audemars Piguet
Model: Day Date 25594BA
Movement: mechanical automatic AP Caliber 2224/2825
Functions: day, date, moonphase, hours, minutes
Features: gold dial, stick hands
Case: 36 mm yellow gold 
Crystal: sapphire front
Bracelet: yellow gold AP-stamped bracelet and clasp
Year: c. 1985
Box & papers: Extract from the Archives (to follow), service paperwork from Audemars Piguet from late 2020, original unsigned crown
This Audemars Piguet Royal Oak Day Date 25594BA is in very good condition for a watch of its age. The case and bracelet are excellently finished, with angular, bevelled, polished and granular surfaces. There are marks throughout the case and bracelet consistent with wear over time, most noticeably on certain sections of the bracelet. During a recent service with Audemars Piguet, in late 2020, the previous owner asked for the watch to be left in unpolished condition, in order to preserve the original lines. In order to ensure insulation of the movement, the crown was replaced with a service part, though the owner also asked to keep the original, unsigned crown, which accompanies this 25594BA. The movement was also fully serviced. The original bracelet shows limited signs of stretch and has 19 links. This Royal Oak Day Date 25594BA comes with the remainder of its service warranty from Audemars Piguet is guaranteed for authenticity from A Collected Man.

All of our pre-owned watches have undergone thorough mechanical inspections, including being ultrasonically cleaned, serviced and resealed if appropriate and tested for at least four days, to ensure they meet our highest timekeeping standards. Our pre-owned and vintage watches, unless stated otherwise, are covered by a full or a limited twenty-four month warranty. For example, due to their age, some vintage watches should not be subjected to the same conditions as when they were new. Please see our Terms & Conditions for further information. 

All of our new watches are covered by the warranty from the original manufacturer. Please contact us for further information.

During a period of adjustment, we are unable to ship watches to the EU. We continue to offer express delivery to all other countries.

If ordering from the UK before 1 PM, your watch will be sent the same working day. The courier will depend on the value of the watch, with all watches delivered the next working day.

If ordering from outside Europe, delivery will depend on choice of courier and destination. 

Please note that pre-owned goods (in the United Kingdom) are subject to a marginal rate of VAT, which can not be reclaimed. For further information, please see here.

You can cancel your order without giving any reason, within 14 days from the day the watch has been delivered to you.

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