Zenith · El Primero

Strap for El Primero Lightweight

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
Reference10.2260.400/69.R573
FamilyEl Primero
MovementZenith caliber El Primero 400B Titanium Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel
CaseCarbon, Aluminium

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 10.2260.400/69.R573

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The El Primero 10.2260.400/69.R573, seen from the bench

The Zenith El Primero 10.2260.400/69.R573 is the contemporary evolution of the first integrated automatic chronograph, born in 1969. The El Primero 400B Titanium caliber beats at 36,000 alternations per hour, an unmatched standard among mainstream automatic chronographs. The 45mm case combines carbon and aluminum for reduced weight while maintaining structural rigidity, featuring hours, minutes, small seconds, date, and a column chronograph. The 20mm lug width is precisely proportioned to the case mass, ensuring visual harmony without sacrificing strap area.

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