Perpetual Calendar Chronograph Ref. 5270: a new complicated wristwatch with a rich 70-year
heritage of tradition and innovation

• Technical data
  
• Grand Complication Ref. 5270 in 18K white gold
  Perpetual Calendar Chronograph
  
• Movement: Caliber CH 29-535 PS Q
  Manually wound mechanical movement, column-wheel chronograph, chronograph hand, instantaneously jumping 30-minute counter, and subsidiary seconds. Perpetual calendar with day, month, leap-year cycle and day/night indication in apertures, analog date. Moon phases.
  
• Diameter: 32 mm
  
• Height: 7 mm (of which 1.65 mm for the perpetual calendar)
  
• Number of parts: 456 (of which 182 for the perpetual calendar)
  
• Number of jewels: 33
  
• Power reserve: 65 hours
  
• Balance: Gyromax®
  
• Frequency: 28,800 semi-oscillations/hour (4 Hz)
  
• Balance spring: Breguet
  
• Functions: Two-position crown
  – Pushed in: To wind the watch
  – Pulled out: To set the time and stop the seconds hand
  
• Displays: Center hour and minute hands
  Chronograph hand (trotteuse) from the center
  Subsidiary dials:
  – 30-minute counter between 3 and 4 o'clock
  – Subsidiary seconds between 8 and 9 o'clock
  – Date at 6 o'clock
  Apertures:
  – Day and month on an axis beneath 12 o'clock
  – Moon phase at 6 o’clock
  – Day/night indication between 7 and 8 o'clock
  – Leap year cycle between 4 and 5 o'clock
  Corrector push pieces:
  – Day corrector between 1 and 2 o'clock
  – Month corrector between 12 and 1 o'clock
  – Moon-phase corrector between 6 and 7 o'clock
  – Date corrector between 11 and 12 o'clock
  Delivered with correction stylus in ebony and 18K white gold
  
• Chronograph pushers: – Start and stop at 2 o'clock
  – Reset at 4 o'clock
  
• Hallmark: Patek Philippe Seal
  Features:
  
• Case: 18K white gold, sapphire crystal, screwed display back with sapphirecrystal
  window
  Water-resistant to 30 meters
  
• Case dimensions: Diameter: 41 mm
  Height: 12.40 mm
  Width between lugs: 21 mm
  
• Dial: Silvery opalescent
  Twelve applied hour markers in black-oxidized gold
  Leaf-shaped hour and minute hands in black-oxidized gold
  Counter-balanced chronograph hand from the center
  Subsidiary dials, off-center, circular guilloché pattern
  – Subsidiary seconds between 8 and 9 o'clock. Leaf-shaped hands in black-oxidized gold
  – 30-minute counter between 3 and 4 o'clock: Leaf-shaped hands in blackoxidized gold
  
• Strap: Alligator leather with square scales, hand-stitched, matt black, foldover clasp in 18K white gold