George Daniels is a renowned brand name when it comes to unique priceless timepieces. And Yellow Gold Space Traveler I pocket watch is the manufacturer’s most expensive, having auctioned for $4.32 million.

This pocket watch is not expensive for nothing, it’s worth all the price tag put on it. It’s mechanically fascinating, as it operates on an independent double-wheel escapement, which allows it to show two different time zones.

 After its completion in 1982, George Daniels sold it to Bobbinet, who was an English antique watch dealer. He later sold it at Sotheby’s auction in Geneva in 1988 for only CHF 220,000. The watch is one of the rarest and has never appeared in public again after its 1988 sale.