Omega · Constellation

Strap for Constellation Manhattan 25 Quartz Sedna Gold / MOP / Diamond

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

Lug width16 mm
Case diameter25 mm
Reference131.55.25.60.55.001 (aka: 13155256055001)
FamilyConstellation
MovementOmega caliber 4061 Hours, Minutes
CaseSedna Gold

Spring bar

Spring bars for Omega

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

Straps for the Constellation 131.55.25.60.55.001 (aka: 13155256055001)

Selected for the 16 mm lug width

All 16 mm straps →

The Constellation 131.55.25.60.55.001 (aka: 13155256055001), seen from the bench

The Omega Constellation with reference 131.55.25.60.55.001 is equipped with the Omega 4061 caliber with hour and minute indication. The case features 15.90mm lugs. The movement provides the essential functions of time reading.

Frequently asked questions

What is the lug width of the Omega Constellation 131.55.25.60.55.001?

The lug width of this model is exactly 16mm. This dimension is the structural parameter that defines which strap is compatible. It is measured as the internal space between the case lugs at 12 and 6 o'clock: any strap for the Constellation 25mm Sedna Gold must have a 16mm lug width to fit correctly.

Which strap is recommended for the Constellation 131.55.25.60.55.001?

For this Sedna Gold case, the ideal options are: dark brown or black Mississippi alligator (pure luxury), shell cordovan that ages naturally toward warm tones, vegetable-tanned calf leather in chestnut (elegant everyday wear), or medical-grade FKM rubber with fine texture for versatility. Alligator remains the most formal choice, cordovan the most sought-after.

How do you change the strap on an Omega Constellation 25mm?

Using a springbar tool, gently lift the small elastic pin that secures the strap to the case lugs. Remove the old strap, insert the new one by aligning it to the lugs, and reinsert the pin. Caution is required to avoid scratching the Sedna Gold case: an atelier ensures professional installation without risk.

Is an aftermarket 16mm strap compatible with the Constellation 131.55.25.60.55.001?

Yes, provided the lug width is strictly 16mm. Quality aftermarket straps from specialized suppliers fit perfectly. Always verify the technical specification provided by the vendor: 16mm is non-negotiable for this model.

How long does a leather strap last on a watch worn daily?

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) lasts 3–5 years with daily wear. Durability depends on care (wipe away sweat, avoid prolonged water exposure), frequency of use, and type of work. Vegetable-tanned straps reverse the aging process to their advantage. An 18-month warranty covers manufacturing defects.

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