How to choose your ZENITH El Primero watch?
Four criteria guide your choice: the host collection, calibre version, style and legibility. El Primero is the calibre, the movement, not a collection in itself: it powers all Chronomaster and several Defy models. In terms of versions, the El Primero 3600 (Chronomaster Sport) measures to 1/10th of a second thanks to its 5 Hz frequency. The El Primero 3620 (Defy Skyline) is offered as a pure automatic without chronograph. The Open version features a cut-out exposing the escapement directly on the dial. The Revival revisits the original 1970s architecture in 37–38 mm cases. Prices range from €9,500 to over €24,700.
A closer look at the versions helps refine this choice: the El Primero 3600 ★, found in the Chronomaster Sport, beats at 36,000 vph and displays the chronograph to 1/10th of a second, for around €11,500 to €45,100; the base El Primero, on the Chronomaster Original, offers a classic chronograph between €10,300 and €24,700; the El Primero Open, on the Chronomaster Open, skeletonises the chronograph at a comparable price; the vintage version on the Chronomaster Revival, in a compact 37–38 mm case, trades between €9,500 and €10,000; finally the El Primero 3620, fitted to the Defy Skyline as a pure automatic without a chronograph, ranges from €9,500 to €16,500.
Which El Primero for which profile?
- Maximum 1/10 s performance → Chronomaster Sport
- Classicism and triple calendar → Chronomaster Original
- Visible mechanics on the dial → Chronomaster Open
- 1970s spirit, compact case → Chronomaster Revival
- Automatic without chronograph → Defy Skyline
The Auberi insight: the Chronomaster Sport is our most requested El Primero on the Côte d'Azur, its iconic tricolour dial is equally at home in Monaco as in Saint-Laurent-du-Var. For clients who want the El Primero without a chronograph, the Defy Skyline 41 mm is the most versatile sport alternative.
Frequently asked questions
Why is the El Primero called "the first"?
ZENITH presented the El Primero in January 1969, hours ahead of Rolex and Breitling. It is the world's first automatic high-frequency chronograph: 36,000 vph versus 28,800 for standard movements. This frequency enables 1/10th-second measurement on modern versions.
Do all ZENITH watches have an El Primero calibre?
Almost all. The Chronomaster and most Defy models are powered by a variant of the El Primero. G.F.J. watches use calibre 135, a different historical movement. Pilot watches use the El Primero 4062 with big date and flyback.
What servicing does an El Primero calibre need?
ZENITH recommends a service every 5 to 7 years: full disassembly, cleaning, lubrication, inspection of the 250-component movement. Our Nice watchmaking workshop is accredited for ZENITH servicing. Allow 6 to 8 weeks for a full chronograph service.
Does the El Primero 3600 really measure to 1/10th of a second?
Yes. The El Primero 3600, found in the Chronomaster Sport, features a central chronograph hand that completes one full revolution in 10 seconds, allowing direct 1/10th-second reading, no calculation or estimation required.
Can you see the El Primero movement on the dial?
On the Chronomaster Open, yes: a cut-out on the dial reveals the column wheel and escapement in motion. On other Chronomaster models, a sapphire case back shows the rotor and movement from the reverse.
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