Zenith · Chronomaster Sport

Strap for Chronomaster Sport Yoshida Stainless Steel / Green / Bracelet

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 diameter41 mm

Reference03.3107.3600/56.M3100

FamilyChronomaster Sport

MovementZenith caliber El Primero 3600 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel

CaseCeramic, Stainless 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 Chronomaster Sport 03.3107.3600/56.M3100

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Chronomaster Sport 03.3107.3600/56.M3100, seen from the bench

The Zenith Chronomaster Sport 03.3107.3600/56.M3100 is a contemporary evolution of the legendary El Primero chronograph caliber from 1969. This column-wheel chronograph features a 41mm stainless steel and high-tech ceramic case with a sculptural profile, visible through a sapphire caseback. The automatic El Primero 3600 movement oscillates at 36,000 vph (10 Hz), delivering 1/10-second chronograph resolution. The 20mm lug width is standard for modern mid-large chronographs and ensures optimal strap compatibility and wrist balance. Water resistance reaches 100 meters.

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