Singer John Mayer spotted wearing a IWC

John Mayer has long occupied a rare space among celebrity watch collectors — not merely an owner of expensive timepieces, but a genuine student of horology who has spoken at length about movements, references, and the cultural history of specific watches. This sighting, captured in what appears to be a relaxed, conversational setting, adds another important piece to the documented catalogue of his collection: the IWC Aquatimer Cousteau Divers, reference IW354007, in 18k yellow gold.

The watch on display in the detail shot is immediately recognizable by its vivid electric-blue sunburst dial, bearing the text 'COUSTEAU DIVERS' below the IWC Schaffhausen logo — a nod to the long-standing partnership between the Swiss manufacture and The Cousteau Society, a marine conservation organization founded by legendary oceanographer Jacques-Yves Cousteau. The dial features applied rectangular hour markers with luminous fill, an orange-tipped seconds hand for underwater legibility, and a unidirectional rotating dive bezel with a distinctive triangular marker at twelve o'clock. The case, rendered in warm 18k yellow gold, gives this sports watch an incongruous but compelling luxury character.

IWC's relationship with The Cousteau Society dates to 1977, when the manufacture began donating a portion of proceeds from Aquatimer sales to ocean conservation. The gold-cased Cousteau Divers variants from the late 1990s and early 2000s — including ref. IW354007 — represent the apex of this collaboration in terms of material extravagance, pairing a tool-watch DNA with precious metal execution. The movement within is IWC's calibre 37524, an automatic with date, beating at 28,800 vph with a 42-hour power reserve.

For Mayer, the choice is characteristically deliberate. He has publicly discussed his reverence for watches that carry narrative weight — pieces tied to real-world history rather than purely aesthetic statement. A gold dive watch honoring one of the 20th century's greatest explorers fits that sensibility precisely.

On the secondary market, gold-cased Cousteau Divers examples in strong condition have appreciated steadily, driven by collector interest in both IWC vintage pieces and conservation-linked provenance. Examples regularly transact between $8,000 and $14,000 depending on condition and completeness of set.