The Patek Philippe Calatrava is a line of dress watches built by the premier Swiss watchmaker Patek Philippe, introduced in 1932. These watches are considered the flagship model of Patek Philippe. The least expensive of the Calatrava line for men is about $18,000 USD as of 2008.
One famous model in the Calatrava line is the 3919 which was replaced recently by the slightly larger 5119 model. This change in size reflects the growing trend for larger watches. Another famous model is the reference 96, whose modern incarnation is the considerably larger 5196. Some Calatravas (such as the modern-day 5127) feature a date function, whereas others (such as the 5196) are "time-only" watches.