In the early 1990s, Audemars Piguet tasked its in-house designer Emmanuel Gueit to reinvent the classic Royal Oak model and infuse it with new life and power. For years, Gueit and his team worked on a prototype and subsequently presented the final product, reference 25721, in 1993 in Basel. The result was astonishing and something completely different from what the public had ever seen before. It was shortly nicknamed “The Beast” due to what was, at the time, its astonishing 42mm case size. The launch of reference 25721 marked the beginning of the Offshore lineage. In fact, it arguably established the trend for large-size watches, which today is the complete norm. The model was released in titanium and stainless steel.

The present "E Series" in titanium is an incredibly well-preserved example, displaying an attractive grey dial which perfectly compliments the grey tone of the case material.

So integral is this model to Audemars Piguet that the manufacture re-released reference 25721 in their current line in production in 2021 - reference 26238TI which houses an automatic in-house movement.