Zenith · El Primero

Strap for El Primero Chronomaster Open Stainless Steel / Black / Alligator

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

Reference03.2040.4061/21.C496

FamilyEl Primero

MovementZenith caliber El Primero 4061 hours, minutes, small seconds | Chronograph, column wheel

Year2017 - 2021

CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

View →

Straps for the El Primero 03.2040.4061/21.C496

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The El Primero 03.2040.4061/21.C496, seen from the bench

The Zenith El Primero 03.2040.4061/21.C496 is a chronograph embodying the 1969 watchmaking revolution, featuring the first integrated automatic chronograph caliber operating at 36,000 vibrations per hour. The 42mm stainless steel case delivers sporting character and solidity, while the El Primero 4061 movement remains among the most acclaimed in contemporary Swiss watchmaking. The column wheel ensures precise, silent chronograph operation with 1/10 second resolution visible on the subdials. Lug width: 20mm.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only