Zenith · El Primero

Strap for El Primero 146 Stainless Steel / Blue

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

Lug width20 mm
Case diameter38 mm
Reference03.2150.4069/51.C805
FamilyEl Primero
MovementZenith caliber El Primero 4069 hours, minutes, small seconds | Chronograph, column wheel
Year2017
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 03.2150.4069/51.C805

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The El Primero 03.2150.4069/51.C805, seen from the bench

The Zenith El Primero 03.2150.4069/51.C805 is an automatic chronograph featuring the caliber El Primero 4069, the first high-frequency automatic chronograph movement (36,000 beats/hour) created in a manufacture. The 38mm stainless steel 316L case houses hours, minutes on central disc, small seconds in subdial, and a complete chronograph function with column wheel architecture. The 20mm lug width ensures optimal weight distribution on the wrist while maintaining proper visual proportions between case and strap.

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