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Grande Chronomaster XXT Quantième Perpétuel

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Reference
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Collection
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Description

Grande Chronomaster XXT
Quantième Perpétuel

Caliber  
  New El Primero 4003 movement
Automatic chronograph movement with perpetual calendar, COSC certified
13```caliber. Diameter 30 mm. Height : 8.10 mm
31 jewels. 36'000 vibrations per hour
Power reserve over 50 hours
Measures short time intervals to a 10th of a second
Automatic winding in both directions.
Central rotor on ball bearings
22-carat white gold oscillating weight with “Côtes de Genève” pattern, or 22-carat rose gold with “grain d'orge” guilloché pattern
Functions  
  Hours and minutes in the center
Small seconds-hand at 9 o'clock
Perpetual calendar :
date at 3 o'clock
moon phases at 6 o'clock
day at 9 o'clock
month and leap year at 12 o'clock
Center seconds-hand
30-minute counter at 3 o'clock
12-hour counter at 6 o'clock
Tachometric scale on the dial
Case  
  18-carat white or rose gold
18-carat white or rose gold ZENITH push buttons and crown
Diameter : 45 mm. Diameter opening : 35 mm
Curved sapphire glass with anti-reflection treatment on both sides. Transparent sapphire case back
Water-resistant up to 30 meters
Dials  
  Gold dials. Powdered black or guilloché silver dials
18-carat white or rose gold hand-mounted applique indexes
Hands  
  18-carat white or rose gold faceted hands
Strap  
  Black alligator leather strap, hand-stitched tone-in-tone, lined with silky Alzavel calfskin.
Buckle  
  18-carat white or rose gold ChronoMaster triple folding buckle engraved with the historical ZENITH star on the cap