Twenty~4 7340/1R-001The Twenty~4 collection welcomes its very first complication: a perpetual calendar, one of Patek Philippe's most emblematic Grand Complications. Thanks to ultra thin self winding 240 Q caliber, the non gem set case has retained its elegant slimness. The calendar indications appear in three subdials, complemented by a moon phase aperture, thus creating one of the most recognizable faces amongPatek Philippe perpetual calendars. The silver toned dial is