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Omega · Constellation

Strap for Constellation Co-Axial 35 Stainless Steel / Yellow Gold / Black

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

16mm
16 mm strapsAll Omega
Lug width16 mm
Case diameter35 mm
Reference123.20.35.20.01.002 (aka: 12320352001002)
FamilyConstellation
MovementOmega caliber 2500 Hours, Minutes, Seconds | Date | Co-Axial Escapement, Chronometer
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Omega

The right category for this model · choose the 16 mm size

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Straps for the Constellation 123.20.35.20.01.002 (aka: 12320352001002)

Selected for the 16 mm lug width

All 16 mm straps →

The Constellation 123.20.35.20.01.002 (aka: 12320352001002), seen from the bench

The Omega Constellation reference 123.20.35.20.01.002 is equipped with the automatic caliber 2500 featuring the Co-Axial escapement and chronometer certification. The movement offers central hour, minute, second and date indication. The functions include Omega's patented Co-Axial escapement, reducing friction between the movement's components.

Frequently asked questions

What is the exact lug width of the Omega Constellation 123.20.35.20.01.002?

The lug width of the Constellation 123.20.35.20.01.002 measures exactly 16 millimetres. This dimension is specific to this model and does not represent a common standard. To verify strap compatibility, measure with a digital calliper the internal distance between the two lugs: it must be exactly 16mm. Even a minimal variation compromises correct installation.

Which strap material pairs best with the bicolour Constellation gold/steel?

Dark brown or black alligator represents the classic luxury choice, with regular texture that elegantly complements the bicolour. For those who appreciate natural ageing, vegetable-tanned calf develops a rich patina over time. Whiskey or burgundy shell cordovan dialogues magnificently with 18k gold, developing golden hues with use. A dense nylon NATO fabric also offers contemporary versatility.

How do I change the strap on my Omega Constellation 123.20.35.20.01.002?

The strap installs onto the case lugs. Use a dedicated strap removal tool to gently push the lug spring from inside outward. Once the spring is released, the strap slides out easily. Installing the new strap follows the reverse path: align the strap bar with the lug and push until you hear a slight click. Always verify that the strap is centred on the lug before wearing the watch.

Can I use a standard aftermarket 16mm strap on this model?

Yes, provided the strap is certified 16mm. However, we recommend artisanal straps custom-made for this specific reference: the straight lugs and case geometry require exact bar widths and careful craftsmanship. Customisable online straps allow you to choose leather, colour, thickness and thread type, ensuring perfect compatibility and aesthetics consistent with the gold/steel bicolour.

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

A quality leather strap, if subjected to moderate use, lasts on average 3-5 years. Alligator and shell cordovan guarantee superior longevity due to fibre density. Vegetable-tanned calf, while softer, develops a protective patina over time. Durability depends on environmental factors (humidity, sun exposure) and frequency of use. The artisanal warranty offered by Casati Milano (18 months) covers manufacturing defects; any early replacement is due to natural wear, not manufacturing flaws.

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