The Calatrava, Ref. 5053 is a modern incarnation of the classic Patek Philippe Calatrava.
Although the Patek Philippe Calatrava line is best-known for the understated Ref. 5196 and hobnail-bezel Ref. 5120, Patek Philippe has been producing an officer's watch as part of the line since 1989. That limited-edition piece paved the way for Ref. 5022 and this Ref. 5053, both full-production pieces. This reference was introduced in 2001 and replaced with Ref. 5153 after 2009.
Introduced in 2001, Ref. 5153 is true to the Patek Philippe Officer's Watch design with one major exception It uses the center seconds Cal. 315 S C rather than a more-traditional small seconds movement. Otherwise it is much more similar to the original Ref. 3960 from 1989 than its predecessor, Ref. 5022. The traditional “officer's case” features screwed lugs, a large crown, and a hinged case back over a sapphire window showing the movement. For this reason, many prefer this reference to its successor, the radically-dialled Ref. 5153.