Zenith · El Primero

Strap for Chronomaster Open Rose Gold / Silver / Calf

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm

20 mm straps All Zenith

Lug width20 mm

Case diameter40 mm

Reference18.3300.3604/69.C922

FamilyEl Primero

MovementZenith caliber El Primero 3604 Hours, Minutes, Small Seconds | Chronograph, Column wheel

CaseRose Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the El Primero 18.3300.3604/69.C922

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The El Primero 18.3300.3604/69.C922, seen from the bench

The El Primero was introduced by Zenith in 1969 as the first automatic high-frequency chronograph movement. It mounts the El Primero 3604 caliber with column-wheel for the chronograph functions. The movement offers indication of hours, minutes, small seconds, and chronograph.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only