Complication/en

Complication

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Patek Philippe Sky Moon Tourbillon Ref. 5002

Mechanism in addition to the time display. For various displays and functions: chronograph, perpetual calendar.

Known examples:

• Tourbillon
• repeater
• Perpetual calendar
• Alarmfunktion
• Reserve power indicator
• Weltzeituhr
• Moon-phase display
• Equation of time (Zeitgleichung)
• Astronomische Anzeigen
• big date
• Double chronograph

For an example of the rarest complications united in a wristwatch, see the "Sky Moon Tourbillon" by Patek Philippe. Note that this watch is on offer for sale, for a mere $1,100,000, so let me know if the link is no longer valid, and so presumed sold.