Calatrava Travel Time Ref. 5134 in platinum.

This complicated wristwatch simultaneously displays the time at two different locations anywhere in the world. In the watch shown here, the hand in 18K white gold indicates local time as 8.08 AM or 8.08 PM. The black openwork hour hand in 18K gold and the small black hand in the 24-hour subsidiary dial at 12 o'clock tell the traveler that home time is 10.08 PM.
The white gold hour hand that indicates local time can easily be moved clockwise or counterclockwise - depending on whether the trip is westbound or eastbound - by pressing the corrector buttons in the left-hand side of the case.
For this new and exclusive platinum Calatrava Travel Time model, Patek Philippe totally redesigned the dial to achieve a contemporary look.
Its Dauphine hands and applied hour markers in 18K white gold contrast against a two-tone silver background. The sapphire-crystal caseback reveals the exquisite manually wound mechanical caliber 215 PS FUS movement.
As all of Patek Philippe's mechanical movements, it is hallmarked with the coveted Geneva Seal.