ZENITH - Chronomaster


Stainless steel, El Primero 3604, 39.5 mm. Made in Le Locle, Switzerland. Model 03.3300.3604/21.C822
Editor's notes

The CHRONOMASTER Open offers a view of the beating heart of the El Primero movement from the dial. Crafted in a sleek 39.5mm steel case, this version features a matte black dial with tricolour counters and a transparent counter for the running seconds, paired with a black cordura-effect rubber strap. Powered by the El Primero 3604 1/10th of a second automatic chronograph movement.


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Technical Specifications


Model: 03.3300.3604/21.C822

El Primero 3604


Components: 269

Jewels: 35

Frequency: 36,000 VpH (5 Hz)


Bracelet Material: Black "Cordura" effect

Bracelet Interhorn (case): 20

Bracelet Interhorn (buckle): 16

Interchangeable strap system: No

Stainless steel triple folding clasp


Black matte with two different-coloured counters & an Hesalite counter


Hours and minutes in the centre

Small seconds at 9 o'clock

1/10th of a second Chronograph:

- Central chronograph hand that makes one turn in 10 seconds

- 60-minute counter at 6 o'clock

- 60-second counter at 3 o'clock

Water resistance: 10 ATM


Case-back: Transparent sapphire crystal

Crystal: Domed sapphire crystal with anti-reflective treatment on both sides

Hour-markers: Rhodium-plated, faceted and coated with SuperLuminova SLN C1 [Hour markers]

Case material: Stainless steel

03 3300 3604 21
03 3300 3604 21 03 3300 3604 21

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