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Sanad Index
Brand

Zenith

Le Locle manufacture known for the El Primero, a high-frequency automatic chronograph calibre introduced in 1969 and still central to the collection.

Zenith

Chronomaster El Primero

Chronomaster Original (El Primero 3600 generation), Ref. A384 (1969 original El Primero reference, predecessor design)

What a Model Page Covers
  • Specifications — case size, movement, materials and reference numbers.
  • History and context — how the model came to be and how it has evolved.
  • Buying and ownership considerations — what collectors weigh before buying or owning this model.

More Zenith models are added to the directory over time.

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