Omega · Constellation

Strap for Constellation Master Chronometer 41 Stainless Steel / Ceramic / White

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter41 mm
Reference131.33.41.21.04.001
FamilyConstellation
MovementOmega caliber 8900 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2022
CaseCeramic | Ceramic, Stainless Steel

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Constellation 131.33.41.21.04.001

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Constellation 131.33.41.21.04.001, seen from the bench

The Omega Constellation represents one of the historic lines of the Swiss manufacture, characterized by the distinctive griffes on the case. Reference 131.33.41.21.04.001 is equipped with the automatic caliber 8900 with Co-Axial escapement and chronometer certification. The movement offers hour, minute, second and date indications.

Frequently asked questions

What is the lug width of the Omega Constellation 131.33.41.21.04.001?

The lug width of the Constellation 131.33.41.21.04.001 measures exactly 20 mm. This width is the modern standard for medium-to-large diameter sports watches. To verify it, measure the distance between the inner lugs of the case: it must be precise at 20 mm to guarantee secure fitting of any aftermarket strap.

What is the best strap for the Constellation 131.33.41.21.04.001?

Black alligator represents the most elegant choice: its fine texture creates sophisticated contrast with the ceramic case. For daily versatility, we recommend vegetable-tanned calf leather with pronounced grain, which develops a natural patina over time. For sports use, black silicone rubber guarantees grip and water resistance without aesthetic compromise.

How do you change the strap on an Omega Constellation?

The change requires a special tool (spring bar tool). Position the watch on a soft surface, locate the pins protruding at the sides of the case, insert the tool into the small hole next to the pin and gently lever to compress the internal spring. When the pin releases, extract it. Reverse the procedure to insert the new strap. If you are not experienced, contact Milano Straps or a certified watchmaker.

Can I use an aftermarket compatible strap on a Constellation?

Yes, provided it respects the 20 mm lug width. Milano Straps offers a collection of artisanal straps certified compatible with the Constellation 131.33.41.21.04.001, made in alligator, shell cordovan, vegetable-tanned calf and rubber. Each strap is customizable in length, stitch color and initials.

How long does a leather strap last on a watch like the Constellation?

A quality leather strap (alligator or vegetable-tanned calf) lasts an average of 5-8 years with daily use, depending on exposure to humidity, sweat and sunlight. Shell cordovan leather lasts longer thanks to its structural density. Milano Straps provides an 18-month warranty on all bespoke straps, with the option of revision and replacement of finishes.

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