Zenith · El Primero

Strap for El Primero Tourbillon Stainless Steel / Black

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter44 mm
Reference03.2050.4035/21.C630
FamilyEl Primero
MovementZenith caliber El Primero 4035 D hours, minutes, small seconds | date | Chronograph, column wheel | tourbillon escapement
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the El Primero 03.2050.4035/21.C630

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The El Primero 03.2050.4035/21.C630, seen from the bench

The El Primero was introduced by Zenith in 1969 as the first high-frequency automatic chronograph movement. The reference 03.2050.4035/21.C630 mounts the El Primero 4035 D calibre with functions of hours, minutes, small seconds, date and column-wheel chronograph. The movement integrates a tourbillon escapement that completes a rotation per minute.

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