Zenith · El Primero

Strap for Chronomaster Open Stainless Steel / Black / Bracelet

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

Reference03.3300.3604/21.M3300

FamilyEl Primero

MovementZenith caliber El Primero 3604 hours, minutes, small seconds | Chronograph, column wheel

Year2022

CaseStainless Steel

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 03.3300.3604/21.M3300

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The El Primero 03.3300.3604/21.M3300, seen from the bench

Zenith's El Primero represents one of the brand's historic chronograph lines, introduced in 1969. The reference 03.3300.3604/21.M3300 features the automatic El Primero 3604 caliber with hours, minutes, small seconds and column-wheel chronograph functions. The movement offers the traditional chronograph complications of the Le Locle manufacture.

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