2012 saw the introduction of Patek Philippe’s new in-house perpetual calendar with split- seconds chronograph – the reference 5204.  SIHH 2013 saw the introduction of Lange’s 1815 Rattrapante perpetual calendar.  Is there anywhere these two COULDN’T be compared head to head?

Click over to the excellent look at these two mega watches from Purists Pro member Foversta right here.