Technical Archive

Zenith
Revival 03.A384.400/21.M384— lug 20mm

Zenith Revival 03.A384.400/21.M384: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

El Primero A384 Revival 50th Anniversary El Primero Stainless Steel / Panda / Ladder

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Zenith 03.A384.400/21.M384
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

03.A384.400/21.M384

Movement

Zenith caliber El Primero 400 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel

The Heritage

The Zenith El Primero A384 Revival 50th Anniversary features a 37mm cushion steel case with a 20mm lug width. It houses the El Primero 400 caliber, a celebrated chronograph movement beating at 10 Hz (36,000 vph) for chronograph precision to tenths of a second. The movement includes hours, minutes, small seconds, and date complications with a column-wheel chronograph mechanism.

FAQ

What lug width does the Zenith Revival 03.A384.400/21.M384 have?

The Zenith Revival 03.A384.400/21.M384 is fitted with a 20mm lug width. This measurement is specific to the 37mm cushion case and is essential to ensure proper strap attachment to the case lugs without tension or excessive play. To verify it, measure the distance between the two case lugs where the original attachments articulate.

What is the best strap for the Revival 03.A384.400/21.M384?

The choice depends on your intended use and desired aesthetic. A cognac alligator strap reflects the Revival's era and evokes Swiss sports chronographs from the 1960s. If you prefer a contemporary approach, aged vegetable calf leather offers natural patina and character. For outdoor activities, an FKM rubber strap combines functionality with stylistic coherence. A tactical NATO transforms the Revival into an urban instrument without sacrificing elegance.

How do I change the strap on my Zenith Revival?

The Revival 03.A384.400/21.M384 features two fixed metal lugs that are glued and/or soldered to the case shoulders. If your strap is removable, use a spring bar remover to gently push the spring bar (the elastic pin) and slide the lug from its seat. If the lugs are fixed, the new strap must be threaded around the case itself. Consult a competent watchmaker if you are not experienced with this procedure.

Can I use an aftermarket 20mm strap on this Revival?

Yes, any quality strap with a 20mm lug width is fully compatible with the Zenith Revival 03.A384.400/21.M384. On milanostraps.it you will find a selection of handcrafted 20mm straps made from selected leather, natural rubber, and fabric, all tested for this model. Customization is available for size, stitching thread color, and initial engraving.

How long does a leather strap last on a Zenith Revival?

A quality leather strap, if properly cared for, lasts an average of 18-24 months of daily wear, up to 36 months if worn occasionally. The natural patina of leather (particularly alligator and vegetable calf) increases over time, adding character to the Revival. Factors that reduce its lifespan are prolonged exposure to moisture, sweat, and direct sunlight. Casati Milano straps include an 18-month warranty, during which manufacturing defects are replaced free of charge.

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 →

By appointment only · Milan

The atelier's website: casatimilano.com