Omega · Constellation

Strap for Constellation Master Chronometer 39 Stainless Steel / Yellow Gold / Champagne / Bracelet

Takes 24 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width24 mm
Case diameter39 mm
Reference131.20.39.20.08.001 (aka: 13120392008001)
FamilyConstellation
MovementOmega caliber 8800 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2019
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Omega

The right category for this model · choose the 24 mm size

Straps for the Constellation 131.20.39.20.08.001 (aka: 13120392008001)

Selected for the 24 mm lug width · workshop selection

All 24 mm straps →

The Constellation 131.20.39.20.08.001 (aka: 13120392008001), seen from the bench

The Omega Constellation Master Chronometer 131.20.39.20.08.001 features a 39.00 mm stainless steel and 18k yellow gold case with a champagne dial. Powered by the Omega 8800 Co-Axial COSC-certified chronometer movement, it displays hours, minutes, seconds, and date. The watch has a 24 mm lug width and includes a sapphire crystal with curved anti-reflective coating and transparent caseback showing the movement.

Frequently asked questions

What lug width does the Omega Constellation 131.20.39.20.08.001 require?

The Omega Constellation reference 131.20.39.20.08.001 uses a lug width of 24 millimeters. This specific measurement is crucial when selecting an aftermarket strap: always ensure that the strap is compatible with 24mm lugs by consulting the product technical sheet.

What is the best strap for the Omega Constellation 131.20.39.20.08.001?

The best strap depends on the intended use: for formal elegance, a polished black alligator strap enhances the yellow gold and steel case. For everyday versatility, a brown calf or shell cordovan strap develops extraordinary patina over time. For sports contexts, a natural rubber or NATO fabric strap with a steel deployant clasp is the most practical choice.

How do I change the strap on my Constellation 131.20.39.20.08.001?

The strap is replaced by removing the spring bars (lugs) with a dedicated tool (spring bar tool). Position the bar on the internal spring, push toward the center of the case to release tension, then extract the bar. Repeat on the other side. Insert the new strap by reversing the procedure, ensuring that the bars are properly inserted and locked.

Will the 24mm strap I purchase be compatible with my Constellation 131.20.39.20.08.001?

Yes, any strap with a 24mm lug width is mechanically compatible with your Constellation 131.20.39.20.08.001. Always verify that the strap width and relative keepers fit the case thickness and your personal wrist size. Milano Straps provides free consultation to determine the most aesthetically harmonious choice.

How long will the leather strap I purchase for my Constellation last?

The lifespan of a leather strap depends on leather quality, daily use, and care. A certified quality alligator or shell cordovan strap, used moderately, lasts 5-8 years before requiring light maintenance. Leather subjected to intensive use (sports, perspiration, humidity) requires replacement sooner. Milano Straps offers an 18-month warranty on straps crafted by the Casati Milano atelier.

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