Omega · Constellation

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

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
Reference131.33.41.21.06.001 (aka: 13133412106001)
FamilyConstellation
MovementOmega caliber 8900 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2020
CaseCeramic, 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 131.33.41.21.06.001 (aka: 13133412106001)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Constellation 131.33.41.21.06.001 (aka: 13133412106001), seen from the bench

The Omega Constellation reference 131.33.41.21.06.001 features the automatic caliber 8900 with co-axial escapement and chronometer certification. The movement offers indication of hours, minutes, seconds, and date. The case presents the distinctive Constellation design with the decorative claws on the sides.

Frequently asked questions

What is the exact lug width of the Omega Constellation 131.33.41.21.06.001?

The lug width of the Constellation 131.33.41.21.06.001 is 20mm. This measurement represents the distance between the integrated case lugs and determines which strap is compatible. Do not confuse lug width with case diameter (41mm): lug width is the decisive parameter for purchasing an aftermarket strap.

Which strap material pairs best with the ceramic and steel Constellation 131.33.41.21.06.001?

Premium alligator is the noblest choice: tight grain and natural patina create aesthetic contrast with the ceramic's rigidity. For durability and chromatic evolution over time, vegetable-tanned calf leather is excellent. If you seek versatility, cordura NATO ensures practicality; for those prioritizing mechanical reliability, FKM rubber absorbs vibrations from the Co-Axial movement.

How do you change the strap on an Omega Constellation with integrated 20mm lugs?

The integrated case of the Constellation 131.33.41.21.06.001 requires specific 20mm spring bars. Position the watch in a protective cradle, use a watchmaker's screwdriver to compress the spring bar cores, remove the old strap, and insert the new one until it clicks into place. If you lack experience, entrust the task to a qualified service center to avoid case damage.

Is a 20mm aftermarket strap compatible with the Constellation 131.33.41.21.06.001?

Yes, any strap with 20mm lug width is geometrically compatible with the Constellation 131.33.41.21.06.001. Always verify that spring bars have the correct width and diameter to avoid micro-tensions. Custom artisanal straps also offer the opportunity to choose personalized thickness and finish to optimize aesthetic pairing and wearing comfort.

How long does a natural leather strap last on an Omega Constellation?

Durability depends on material and wearing context. Premium alligator, worn 4-5 days weekly in dry environments, resists 5-7 years before visible wear. Vegetable-tanned calf evolves aesthetically over 8-10 years, improving with time. Constant exposure to water, chlorine, and perspiration reduces lifespan to 3-4 years. An 18-month warranty on artisanal straps covers manufacturing defects and material flaws, but not natural wear from use.

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