Television presenter James May spotted wearing a Rado

James May was recently photographed wearing a Rado Diastar reference 658.0637, a watch that rewards the kind of curious, technically minded owner the former Top Gear presenter has always claimed to be. The sighting is low-key by celebrity standards, which is entirely in keeping with both the man and the timepiece.

The Rado Diastar debuted in 1962 and immediately distinguished itself with a case and bracelet constructed from tungsten carbide-based hardmetal — a material so resistant to scratching that Rado famously demonstrated it by dragging a diamond across the surface. Reference 658.0637 sits firmly in the classic Diastar lineage, featuring the characteristic integrated bracelet that flows seamlessly from the case, a clean dial with applied indices, and that distinctive domed hardmetal construction. The movement inside is a reliable ETA-based quartz calibre, consistent with the Diastar's positioning as a design-led, durability-focused proposition rather than a complication showcase.

Among collectors, the Diastar occupies an interesting niche. It is not a grail watch in the conventional sense, but vintage and classic examples have developed a genuine following among enthusiasts drawn to its material science credentials and its honest, unfussy mid-century Swiss design language. The integrated bracelet design predates the luxury industry's current obsession with the format by decades, and the hardmetal case construction remains genuinely distinctive — no other mainstream manufacturer pursued the same technology with the same commitment.

May is a credible choice for a watch like this. His public interest in engineering, manufacturing, and the mechanics of everyday objects is well documented across his television career — from Top Gear to Our Man In… — and the Diastar is precisely the sort of object that rewards that kind of attention. It is a watch with a real technical story behind it, worn without any apparent interest in status signalling.

The Rado Diastar reference 658.0637 sits at an accessible price point by Swiss watch standards, making it one of the more attainable pieces with genuine horological heritage. Grey market pricing reflects modest demand, though clean vintage examples in good condition are attracting renewed interest as the integrated-bracelet aesthetic continues to drive broader collector conversation.