Patek is a Swiss luxury watch manufacturer that has been in business since 1839. It is renowned for its upscale watches, which are often considered to be some of the most luxurious and expensive watches in the world. The company's flagship product is the Patek Philippe Calatrava, which is a classic dress watch with a timeless design. Patek is also known for its complicated watches, such as the Grand Complication, which features a perpetual calendar, tourbillon, and minute repeater.