Originally launched in March 2011, the Patek Philippe Grand Complication ref. 5216 is the result of 18 successful years of research and development to produce a legendary Grand Complication timepiece with minute repeater, tourbillon, perpetual calendar, retrograde date, and moon phases. With reference 5216, Patek Philippe rises to a further level of sophistication in minute repeaters, launching the legendary caliber R TO 27 PS QR LU movement with the five most popular complications in a perceptibly larger case that encloses a more voluminous resonant cavity to enhance the sonority of the chimes.