Singer John Mayer spotted wearing a Audemars Piguet

John Mayer has never been subtle about his love for high horology, but this Instagram post cuts straight to the point: a Royal Oak Offshore Diver in stainless steel with a deep purple dial and matching purple rubber strap, casually draped across grey sweats while multicolour trainers complete the picture. It is exactly the kind of chromatic confidence that defines Mayer's approach to watch collecting.

The reference in question is almost certainly the 15710ST.OO.A346CA.01, the stainless steel Royal Oak Offshore Diver finished with Audemars Piguet's signature purple 'tapisserie' dial — a colour that reads differently under every light source, shifting from violet to near-indigo in shade. The 42 mm octagonal case carries a unidirectional rotating bezel calibrated for dive timing, four lateral security screws on the case band, and a screw-locked crown, delivering a rated 300-metre water resistance. Inside sits the automatic calibre 3120, a 60-jewel movement beating at 21,600 vph with a 60-hour power reserve — a genuinely robust, in-house architecture with no chronograph complexity to mask its quality.

The Offshore Diver line launched in 2010 and has always occupied a curious niche: it is the most tool-oriented member of the Offshore family, yet its integrated rubber strap and dial colours — purple, blue, green — attract collectors drawn to its wearability rather than its dive credentials. The purple variant in particular has developed a loyal following precisely because the colour is bold enough to polarise opinion, which is exactly what collector pieces should do.

Mayer's watch wardrobe is well-documented — Royal Oaks, Pateks, independents — but his Offshore Diver appearances underscore an understanding that the Offshore is not merely a showpiece. It is a watch you can actually wear hard, which aligns with his stated philosophy of buying watches to use rather than store.

On the secondary market the 15710ST purple dial has appreciated steadily since the reference was discontinued, trading above retail in healthy condition. For a stainless steel Offshore Diver with this dial colour, expect grey-market premiums reflecting both scarcity and Mayer's continued cultural endorsement of the Royal Oak universe.