Audemars Piguet Royal Oak 39 mm 26670ST.OO.1240ST.01 Steel Blue

The Audemars Piguet Royal Oak 26670ST.OO.1240ST.01 stands as one of the most meaningful references in contemporary horology, released as part of the Royal Oak 50th Anniversary collection to commemorate a half-century of a watch that fundamentally changed the luxury industry. When Gérald Genta sketched the Royal Oak overnight in 1971, he created an octagonal stainless steel sports watch that defied every convention of the era — charging luxury prices for a material then considered utilitarian. That audacity became legend, and the 50th Anniversary references honor that legacy with deliberate and thoughtful design choices.

At 39mm, the 26670ST.OO.1240ST.01 occupies a particularly faithful position in the Royal Oak lineup. This case diameter echoes the proportions of early Royal Oak references from the 1970s, offering a more historically grounded wearing experience than larger contemporary iterations. The stainless steel octagonal case is polished and brushed in Audemars Piguet's signature alternating finish — a painstaking technique that requires extraordinary craft — framed by the eight characteristic hex-bolt visible case screws that have become one of the most recognizable motifs in watchmaking.

The blue Petite Tapisserie dial is among the most celebrated surfaces in the Royal Oak's history. Petite Tapisserie refers to the intricate hobnail guilloche pattern applied directly to the dial, a labor-intensive process that produces a three-dimensional texture that catches and refracts light with remarkable depth. The rich blue tone shifts subtly across different lighting conditions, appearing deep navy in shadow and a vibrant electric blue under direct illumination. Applied hour markers and hands in white gold complete the dial with restrained elegance.

Powering the 26670ST.OO.1240ST.01 is a certified Swiss-tested Audemars Piguet automatic movement, maintaining the precision timekeeping that collectors and daily wearers alike expect from the manufacture. The integrated stainless steel bracelet with AP folding clasp continues the seamless visual flow from case to wrist that Genta originally envisioned, with alternating polished and brushed links that mirror the finishing of the case. The result is a watch that functions as a single sculptural object rather than a collection of separate components.

Buying the Audemars Piguet Royal Oak 26670ST.OO.1240ST.01 from Bizak & Co. means acquiring a certified authentic, brand-new example with the confidence of a trusted luxury watch dealer. The 50th Anniversary designation makes this reference historically significant and collectible beyond the already formidable appeal of the standard Royal Oak, and 39mm steel blue Royal Oaks with anniversary provenance have consistently attracted strong collector interest. Whether you are a seasoned Audemars Piguet collector or purchasing your first Royal Oak, this reference represents an exceptional acquisition. Contact Bizak & Co. today to secure this watch or to speak with one of our specialists.