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  • Design
  • Technical
  • Astronomical indications
  • Chronograph

Chronomaster El Primero Grande Date Full Open

Zenith 2017

ref. 03.2530.4047.78.M2530
Men's

Chronomaster El Primero Grande Date Full Open square

An impressive build plus a clear view of the legendary El Primero Chronograph movement, precise to 1/10th of a second: introducing the new Chronomaster, which also displays sun and moon phases. This heavenly ballet is materialised by two overlapping discs. The moon disc rotates once in 59 days while the day/night disc makes its rotation in 24 hours. The absence of a dial combined with the sapphire crystal case back leaves this robust chrono in steel open to admiration from all sides. A silver flange ringed with blue, a black and white minute track plus facetted luminescent markers and hands provide perfect legibility without obstructing the spectacle of the mechanics inside. When it comes to precision, Zenith has nothing to hide.

 

 

Function

  • Function
    Hours, Minutes, Small seconds

Complications

  • Elapsed time measurement
    Double pusher chronograph
  • Calendars
    Large date
  • Astronomical indications
    Moon phases

Movement

  • Movement name
    El Primero 4047B
  • Energy supply
    Self-winding
  • N° of components
    332
  • N° of jewels
    32
  • Power reserve
    50 hours
  • Vibrations
    36000
  • Form
    Round
  • Height/thickness
    9.05 mm
  • Diameter
    30.50 mm

Case

  • Form
    Round
  • Material
    Steel
  • Height/thickness
    15.60 mm
  • Diameter
    45.00 mm
  • Back
    Sapphire
  • Water-resistance
    100 m

Strap

  • Material
    Steel
  • Fastening
    Folding clasp