Zenith · El Primero
Strap for El Primero Chronomaster Grande Date Bi Color Bracelet
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 diameter46 mm
Reference51.2160.4047/01.M2160
FamilyEl Primero
MovementZenith caliber El Primero 4047 hours, minutes, small seconds | date | Chronograph, column wheel | moonphase
CaseRose Gold, Stainless Steel
Straps for the El Primero 51.2160.4047/01.M2160
Selected for the 20 mm lug width · workshop selection
Black Rubberized Alligator Strap with Red Tribal Stitching€185
Matte Dark Gray Alligator Strap€195
Millennium Green Alligator Strap — Minimal Stitching€149
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered Calfskin Strap Light Blue€98
The El Primero 51.2160.4047/01.M2160, seen from the bench
The Zenith El Primero Chronomaster Grande Date Bi Color (ref. 51.2160.4047/01.M2160) is a modern evolution of the world's first high-frequency automatic chronograph, launched in 1969. The 46mm case combines stainless steel and 18k rose gold, creating striking visual contrast. The El Primero 4047 calibre operates at 36,000 bph (10Hz) with column-wheel chronograph independent from the main escapement, offering precision to 1/10th of a second. Functions include hours, minutes, running seconds at 6 o'clock, date window, chronograph, and moon phase. The 20mm lug width is precisely engineered for this case diameter, ensuring optimal strap fit and visual balance.
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