Zenith · El Primero
Strap for Chronomaster Open Stainless Steel / Black / Rubber
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter40 mm
Reference03.3300.3604/21.C822
FamilyEl Primero
MovementZenith caliber El Primero 3604
Hours, Minutes, Small Seconds | Chronograph, Column wheel
CaseStainless Steel
Straps for the El Primero 03.3300.3604/21.C822
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
The El Primero 03.3300.3604/21.C822, seen from the bench
The Zenith El Primero 03.3300.3604/21.C822 represents the pinnacle of a lineage born in 1969: the first fully automatic chronograph in history. This reference preserves the revolutionary DNA of its ancestor, inheriting the column wheel and 36,000 hourly vibrations that guarantee precision to one-tenth of a second. The stainless steel case measures 39.50 mm in diameter. The Zenith caliber El Primero 3604 movement, visible through the caseback, features hours, minutes, and small seconds on the dial, with a column-wheel chronograph functioning with refined mechanics. The 20 mm lug width is architecturally proportioned for this 39.50 mm case size.
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