Patek Philippe’s Calatrava Weekly Calendar 5212A is a beautifully understated piece with a 40mm stainless-steel case and distinctive silver opaline dial. The handwritten-style numerals give it a charming vintage feel, while the clever weekly calendar displays the day, date, month and week number. Powered by Patek’s automatic Calibre 26-330 S C J SE and finished on a hand-stitched light-brown calfskin strap