Patek Philippe · Manual Wind

R TO 27 PS

The tourbillon minute repeater without the calendar: R for répétition minutes, TO for tourbillon, PS for petite seconde. Built for reference 3939 from 1993 to 2009, it runs 336 parts around a one-minute tourbillon carriage carried on three equidistant steel arms beneath a polished steel bridge. A slide in the case band arms the repeater, which strikes hours on a low single gong, quarters on two, minutes on a high one.