John Mayer has a collection of watches worth tens of millions –yes, he said so himself. It’s a good thing he’s wealthy, because an estimated 25% of his net worth has gone towards collecting some pretty valuable timepieces.

John Mayer is pretty well-known in the otherwise esoteric watch community as a prominent collector, a discerning critic, and a champion horologist. In 2013, John appeared on the renowned Grand Prix d’Horlogerie De Geneve as a member of the jury and his love for watches has been called an ‘obsession’ or ‘syndrome’ by other celebrities –and he owns up to it.

Here’s a list of some of the watches that he owns: