Originally introduced back in 1972, the Royal Oak is widely recognised as the single most popular watch in the Audemars Piguet catalogue. When it was initially released, it represented a bold and daring step for the brand, but it enjoyed great success and has since gone on to become AP's flagship model.

In terms of its design, although the watch combines sports watch and dress watch elements, it is less sporty than the Royal Oak Offshore collection and better suited to formal occasions. In this article, we take a more detailed look at the history of the Audemars Piguet Royal Oak, including some of the key changes throughout the years.

THE FIRST ROYAL OAK MODEL

Designed by Gérald Genta, the first Royal Oak model was unveiled at the Baselworld Fair in 1972 and represented a significant break from the conventions of the time. In the midst of the Quartz crisis, Audemars Piguet relied on its watch-making prowess and talent for innovation, releasing what is regarded as the first 'luxury sports watch'.

Visually, the model was defined by its octagonal bezel, fully integrated bracelet and a pattern on the dial, which has variously been described as 'waffle-print' and 'tapisserie'. However, perhaps its most significant feature was its stainless steel case material, which was considered something of a taboo for luxury brands at the time.

The model, which would become known as the Reference 5402, was initially given a limited 1,000-piece release and it took over a year for the manufacturer to sell those 1,000 watches. However, sales then took off and thousands more models were released on general sale, with B and C-series serial numbers.

AP ROYAL OAK INNOVATIONS

With the company's calculated risk paying off, the collection was expanded in 1981 with the release of the Royal Oak Perpetual Calendar. As the name suggests, the main change was the inclusion of a perpetual calendar function, meaning that no intervention was required to adjust the date display, regardless of leap years.

This new model was also notable for being powered by the Calibre 2120/2800 movement, which was specifically designed to allow the watch to be the thinnest of its type in the world at that point. Meanwhile, the changes to the dial to accommodate the new calendar function gave it a slightly more sporty quality.

A few years later, in 1984, AP released a slightly dressier alternative, in the form of the Royal Oak Day/Date Moonphase. The dial on this model was more in-keeping with the first Royal Oak model, but featured three sub-dials. Two of these displayed the day and the date, while the third was a moon phase indicator.

NEW ROYAL OAK COLLECTION

Despite the 1993 release of the Royal Oak Offshore collection, which has a distinctly more sporty appearance, AP has remained faithful to its main Royal Oak line. Today, the Reference 15202, affectionately known as the Royal Oak 'Jumbo', is the most popular model in the collection, paying tribute to the original Royal Oak timepiece.

Indeed, the watch makes use of the same Calibre 2121 movement that the 1972 model used and features a very similar case. In 2012, an updated version of the Reference 15202 was released, with subtle changes to the dial, such as the placement of the 'AP' initials, bringing it even closer in line with the original.

With that being said, AP has also retained its reputation for innovation. For instance, in 2002, the company released the Royal Oak Concept; an ultra-robust version, which utilised alacrite 602, a superalloy more typically associated with aerospace engineering. Then, in 2010, Audemars Piguet released the Royal Oak Equation of Time, which featured a perpetual calendar, moon phase indicator, sunrise and sunset indicator and a solar time function.