Zenith
Chronomaster Open Japan Blue 03.3301.3604/51.M3330
03.3301.3604/51.M3330
A Japan-only 100-piece Chronomaster Open brings a gradient blue dial, mother-of-pearl counters and an additional Okayama-denim strap to the 5Hz El Primero chronograph.

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Specifications
| Reference | 03.3301.3604/51.M3330 |
|---|---|
| Movement | automatic |
| Calibre | El Primero 3604 automatic 1/10-second chronograph |
| Diameter | 39.5 mm |
| Water resistance | 10 m |
Omitted specifications have not been confirmed. From published article 2026-10-21. Original source ↗
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Zenith's blue Chronomaster Open Japan Edition makes El Primero shine ↗