The Patek Philippe Calatrava Pilot Travel Time Ref. is based on old Patek Philippe hour angle watches that helped pilots calculate their position when used in tandem with a sextant and a radio.
Patek Philippe Grand Complication Pocket Watch Made for Stephen Palmer
New Authentic Patek Philippe Grand Complications Men's Watch, Model Number features Automatic Movement. Made from White Gold, This Watch has a Cream dial and fitted with a Alligator bracelet.