Zenith · El Primero

Strap for El Primero Stratos Flyback Tribute to Felix Baumgartner

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

Lug width20 mm
Case diameter45 mm
Reference03.2066.405/69.R515
FamilyEl Primero
MovementZenith caliber El Primero 405B Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel, Flyback
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 03.2066.405/69.R515

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The El Primero 03.2066.405/69.R515, seen from the bench

The Zenith El Primero was introduced in 1969 as the first automatic high-frequency chronograph movement. The model features the El Primero 405B caliber with functions for hours, minutes, small seconds, date and a flyback chronograph with a column wheel. Reference 03.2066.405/69.R515 has technical specifications dedicated to the precise measurement of time.

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