Eric Clapton is selling one of the finest of his watches, an ultra rare platinum-cased Patek Philippe (reference 2499/100P) Perpetual Calendar Chronograph.

Launched in 1951, reference 2499 was in production for nearly 35 years, during which a total of 349 watches were made.

The only two examples ever cased in platinum were most likely never intended for sale. In fact, one of them highlights the wristwatch section of the celebrated Patek Philippe museum in Geneva.

This masterpiece of horology becomes available at auction this year for the first time since its original sale nearly a quarter century ago.

Clapton’s watch is expected to fetch over $4 million when it goes under the hammer at Christie’s Geneva Auction on November 12 at the Four Seasons hotel in Geneva.

Clapton is a renowned watch collector and once released an album called Timepieces. As well as the Patek Philippe watches he also owns several Rolexs.