REF : 5212A-001 1 3 trends.hautehorlogerie.org Patek Philippe TECHNICAL CLASSIC Patek Philippe unveils the delightfully retro Calatrava Weekly Calendar Ref. 5212A in steel, and with it a new calendar function that shows the current week number with the corresponding month, in addition to the day and date. Directly inspired by a one-off timepiece from 1955 – Ref. 2512, now conserved at the Patek Philippe Museum - every detail of this watch's aesthetic has been thoughtfully studied. Patek even designed a typography that recreates handwriting, where every single letter or number is different and unique... a nod to handwritten notes in a paper diary and a reminder of the days when telephones weren't smart and time was "told" by a mechanical watch.