Here’s how it works. He’s used to playing G strings, but now guitar dreamboat and renowned timepiece enthusiast John Mayer has his own signature Casio G-SHOCK watch. What’s more, in a nostalgic move, ...

The physical auction doesn’t take place until 18 June in Los Angeles, so we’d expect all of the aforementioned items to sell for significantly more than the figures we’ve quoted, but we suspect that ...