One of the great classics of the Patek Philippe wrist Grand Complications between 1993 and 2011, Reference 5016 unites in its Calatrava-style case three of the complications most highly prized by devotees of exceptional watches: the tourbillon, the minute repeater and the perpetual calendar with moon-phase display. As an additional refinement, the perpetual calendar is endowed with a retrograde date hand, which flies back to the 1st of the month after having reached the 28th, 29th, 30th or 31st under the action of an ingenious mechanism controlled by a spiral-coiled spring. This graceful interplay of sophisticated functions is orchestrated by a movement comprising 506 parts, all painstakingly finished by hand with the dedication to excellence for which the manufacture is known.