Zenith · El Primero

Strap for El Primero BWD x Fragment

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 diameter42 mm

ReferenceBWD-COL-ZEN-FRAG-EL-PRIM

FamilyEl Primero

MovementZenith caliber El Primero 400B hours, minutes, small seconds | date | Chronograph, column wheel

Year2018

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 BWD-COL-ZEN-FRAG-EL-PRIM

Selected for the 20 mm lug width · workshop selection

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The El Primero BWD-COL-ZEN-FRAG-EL-PRIM, seen from the bench

The Zenith El Primero BWD-COL-ZEN-FRAG-EL-PRIM is a contemporary evolution of the legendary chronograph introduced in 1969. Powered by the Zenith El Primero 400B caliber, this automatic movement beats at 36,000 vph, delivering ten precise pulses per second and revolutionizing chronometric precision worldwide. The case measures 42 mm in stainless steel with a 20 mm lug width, maintaining the iconic design while reinterpreting its aesthetics with refined proportions and geometric bezel.

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