Introduced in 2005, the Patek Philippe ref. 5146 features an annual calendar complication and is the second annual calendar reference serially produced by Patek Philippe. Replacing the ref. 5035, the first annual calendar reference introduced in 1996, the new model featured a rather similar aesthetic. Prior to the release of the annual calendar wristwatch, collectors had to choose either between the super complicated perpetual calendar wristwatch and the simple triple calendar, there was nothing available in between. The introduction of the annual calendar wristwatch certainly filled a spot in the industry where it was needed.

Ref. 5146,5146P-001,5146R,  5146/1J-001, 5146J ,