Patek Philippe · Manual Wind

R TO 27 PS QR

The designation lists the contents: R for répétition minutes, TO for tourbillon, 27 for the ébauche diameter, PS for petite seconde, QR for quantième perpétuel rétrograde. Built for reference 5016 between 1993 and 2011, it gathers all of it into a Calatrava case — 506 parts, of which 72 form a tourbillon carriage weighing 0.3 grams. The repeater strikes on two cathedral gongs and the date hand flies back at month's end.