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PATEK PHILIPPE Grand Complications, Alarm Travel Time, Reference 5520P-001, 950 Platinum, Box and Papers, Year 2022, Like New, Full Set, Germany

Unveiled at Baselworld 2019 after five years of development and four separate patent applications, the 5520P added something genuinely new to Patek's Travel Time concept, a mechanical alarm, striking a classic gong through an entirely new integrated movement built specifically for this reference.

The 42.2mm platinum case carries a bold, symmetrical arrangement of four crowns and pushers, adjusting local time, home time and the alarm independently, styled in the pilot-watch language of the earlier 5524 but pushed into genuinely new territory for the manufacture. Despite the complexity, the case stays a compact 11.6mm thick, worn on a black leather strap with a platinum pin and tang buckle.

The ebony black sunburst dial displays local time centrally through cathedral hands while a skeletonized hand tracks home time on a second plane, with day and night indicators for both zones and the alarm time shown digitally in a double aperture beneath twelve o’clock.

Inside runs the caliber AL 30-660 S C FUS, an entirely new self-winding movement of 574 components and 52 jewels, delivering between 42 and 52 hours of power reserve and carrying the Patek Philippe Seal, with a hammer visible through the sapphire display back striking a gong for up to 40 seconds when the alarm sounds.

This example is offered as in:

- Like-new condition - 2-3 times on the wrist

- First owner

- Full set with box and papers, extra big Patek book etc.

"Patek's first chiming grand complication built for real travel, four crowns, one gong, and five years of development behind it."