Alarm Travel Time (5520P-001)

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Patek Philippe is unveiling a new self-winding grand complication that adds a 24-hour alarm to its exclusive Travel Time display with two time zones; the alarm signal is struck by a hammer on a classic gong. To achieve this, the manufacture created a totally new integrated movement. Four patent applications were filed for the alarm mechanism. It is the result of five years of development work. The new caliber is presented in an elegant platinum case that reflects the Pilot Travel Time design.

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PP 5520P 001 DET 8698

For 180 years, Patek Philippe has been upholding the finest principles of horological artistry, emphasizing performance, reliability, and functionality. With its creations, the manufacture spares no effort to deliver maximum complexity in the smallest possible diameter and height. It also stresses simple and safe operability of each complication, no matter how elaborate it might be. The new Ref. 5520P-001 Alarm Travel Time embodies this ambitious objective with aplomb.

A mechanical challenge

When Patek Philippe’s engineers were asked to develop a new alarm mechanism and to combine it with the Travel Time concept’s two-time-zone arrangement, one objective was to make the watch as thin as possible. Thus, they opted for an integrated movement which requires less height than a caliber with an additional module but is also much more difficult to design and produce. They also wanted this new grand complication to be easily operable, intuitively functional, and protected against incorrect handling. In brief: They wanted it to be an intelligent watch.

That was the starting point for the new caliber AL 30-660 S C FUS, a movement composed of 574 parts and conceived explicitly for this timepiece. This highly complex self-winding movement has a central rotor; it is 31 mm in diameter and 6.6 mm high. Its Gyromax® balance features a Spiromax® balance spring made of Silinvar®, a derivative of silicon. The unique properties of this avant-garde material and the patented geometry of the hairspring assure superb reliability and extreme rate accuracy pursuant to the directives of the Patek Philippe Seal that prescribes a maximum tolerance of -3/+2 seconds per day. The movement has a stop-seconds mechanism that allows the time to be set with one-second accuracy. A sapphire-crystal display back reveals the refined architecture and exquisite finissage of the movement, including chamfered and polished bridge edges, a 21K gold rotor with new rounded recesses, and the decorative Genevan circular graining pattern.

Extremely convenient: two time zones

Introduced in 1997, the exclusive Travel Time function stands out with its ingenious two-time-zone system. The watch has two hour hands from the center. One is skeletonized and displays home time. The other is filled and indicates the local time at the owner’s current location. These hour hands are paired with two day/night indicators (blue-white) in small round apertures – at 3:30 for home time (HOME) and at 8:30 for local time (LOCAL). On the go, all it takes is the actuation of the pushers in the left-hand case flank to adjust the local time clockwise in one-hour increments (pusher at 8 o’clock) or counterclockwise (pusher at 10 o’clock).

The intelligent concept of the time-zone mechanism prevents the rate accuracy of the watch from being affected when traveling across time zones. To simplify adjustments, the pushers are embossed with the symbols + and –. Before a pusher can be actuated, it must be unlocked with a quarter turn, easily accomplished thanks to the fluting; a quarter turn in the opposite direction locks the pusher again. The watch remains water-resistant even when the pushers are unlocked. The analog date with the subsidiary dial in the lower half of the dial is synchronized with local time. Therefore, it automatically increments or decrements when the local-time hour hand is moved forward or backward past midnight. An interesting detail: When both hour hands indicate the same time zone, the local-time hour hand is superposed on the home-time hour hand.

PP 5520P 001 PRESS RVB

Technical Data

Movement:Caliber AL 30-660 S C FUS Self-winding mechanical movement, 24-hour alarm with strike on a classic gong, two time zones (local time and home time), separate day/night indicators for local and home time, analog date
Total diameter:31 mm
Casing diameter:26.6 mm
Height:6.6 mm
Number of parts:574
Number of jewels:52
Power reserve:Min. 42 hours, max. 52 hours
Winding rotor:Central rotor in 21K gold, unidirectional winding
Frequency:28,800 semi-oscillations per hour (4 Hz)
Balance spring:Spiromax® (in Silinvar®)
Balance spring stud:Adjustable
Displays:Local-time hour hand (upper hand) and minute hand from the center
Home-time hour hand (lower hand) from the center
Sweep seconds hand

Analog date at 6 o’clockAperture displays:
– Digital indication of alarm time in 24-hour format at 12 o’clock
– Alarm ON/OFF indication at 12 o’clock
– Day/night indicator for alarm time at 12 o’clock
– Day/night indicator for home time at 3:30 (HOME)
– Day/night indicator for local time at 8:30 (LOCAL)

Functions:3-position crown
• Pushed in: To wind alarm spring clockwise, to wind mainspring counterclockwise
• Pulled halfway out: To set the alarm time in either direction in 15-minute steps
• Pulled all the way out: To set the time in either direction, with balance stop
Correctors:Date between 6 and 7 o’clock
Pushers:Increment local time in one-hour steps at 8 o’clock
Decrement local time in one-hour steps at 10 o’clock
Activate/deactivate (ON/OFF) alarm at 2 o’clock
Patented safety system: Interlock pushers with a quarter turn
Hallmark:Patek Philippe Seal


Mechanical Self-winding




Stainless Steel