Zenith El Primero 03.2050.4035/21.C630

The Zenith El Primero 03.2050.4035/21.C630 takes an 18 mm watch band.

Zenith · El Primero

18mm

lug width

Shop 18 mm bands

Every watch that takes 18 mm →

Lug width: 18 mm
Case diameter: 44 mm
Reference: 03.2050.4035/21.C630
Family: El Primero
Case material: Acciaio
Model: El Primero Tourbillon Stainless Steel / Black

Bands that fit

Cut and stitched in Milano, in the width this watch takes.

Millenium Cognac Alligator Strap€195

Matte Blue Alligator Strap€195

Matte Dark Gray Alligator Strap€195

Hammered Calfskin Strap Light Blue€98

Hammered Calfskin Watch Strap Green with Ecru Stitching€98

See every 18 mm band →

Will a strap close on your wrist?

Set for this watch: 44 mm of case and 18 mm between the lugs. Add your wrist and see where a standard strap would close.

Your wrist

Watch length, lug to lug

Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.

Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.

Why ready-made straps come in one length →

Sizing notes

18 mm is the gap between the lugs, so a 18 mm band goes in without adapters. Whether it sits flush against a 44 mm case depends on how that case is shaped.
Inside the El Primero family the lug width is not one number: it runs 18, 19, 20, 21, 22 mm. This reference is the 18 mm one, so a band bought for another El Primero may not fit it. Why the size changes inside a family →
18 mm is not a common size: only 3,965 of the 41,485 watches measured take it (9.6%), so ready-made choice at this width is narrower than at 20 or 22 mm. Every watch that takes 18 mm →