Patek Philippe is renowned for its timelessly classic watch designs, but its long and illustrious history also witnessed the birth of practical watches, especially pilot’s watches. Early pilots relied on their timepieces, which were indispensable companions during navigation. Two 1930s time-angle display wristwatches in the collection of the Patek Philippe Museum in Geneva bear witness to this heritage. Before the invention of radio navigation and later satellite navigation (GPS), pilots used these flight instruments, also known as celestial instruments, to determine their position. These instruments were set to Greenwich Mean Time (GMT), which pilots calculated longitude by comparing it to local time, which was obtained by observing the positions of celestial bodies using a sextant. replica Patek Philippe Grand Complications ,https://www.proreviewwatch.co