Patek Philippe celebrated their 175th anniversary in 2014, and to commemorate this remarkable milestone, released a series of impressive references, all limited editions, epitomizing the horological mastery that has led to the enduring success of this esteemed manufacture. The reference 5575G was a limited-edition of 1,300 timepieces featuring world time and moon phase. It was released alongside the reference 5975, a multi-scale chronograph executed in white, yellow, pink gold, and platinum; the 5275P, an exquisite platinum chiming wristwatch with digital jump hour; and the reference 5175R, the Grandmaster Chime. The collection was the summation of the brand’s long and prestigious history, reflecting on complicated movements and aesthetic refinement.

The reference 5575G was the first Patek Philippe timepiece that combined a world time complication with a moon phase following the lunar cycle. The brand engineered an entirely new caliber for this watch (and the corresponding ladies' version, the reference 7175 in rose gold), the caliber 240 HU LU (“heures universelle lune”), an ultra-thin automatic movement with a 22 karat gold micro rotor. The moon display is immensely realistic, yet retains an elegance against a nocturnal starry sky, with the skyscape made possible by two sophisticated and highly complex moon phase discs rotating according to the actual orbit of the moon.