Patek Philippe

Friends, as the official Patron Of Smaller Sized Pateks I am asking you for help about this reference. Does anyone have some background information? What was its predecessor?

last october 2016. Very elegant case design and I love these small lugs. Under plastic so photos are blurred. Cheers, Patrickh ...  

Since I dont want to link adverts here, there are 2 on a "leading worldwide watch advertising platform". I like the shape. Could it be that there is no ref. 5023 and it is a typo??

Forget my answer.

Classic hand wound calatrava with small subseconds, cal. 215, and around 33-34mm iirc. Very well proportioned and traditionally styled, it's sadly under appreciated by today's market. Unlike the standard "96" series the case has a stepped rather than flat...