Omega · Constellation

Strap for Constellation Manhattan 25 Quartz Sedna Gold / MOP

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
Reference131.50.25.60.55.001 (aka: 13150256055001)
FamilyConstellation
MovementOmega caliber 4061 hours, minutes
Year2018
CaseSedna Gold

Spring bar

Spring bars for Omega

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

Straps for the Constellation 131.50.25.60.55.001 (aka: 13150256055001)

Selected for the 16 mm lug width

All 16 mm straps →

The Constellation 131.50.25.60.55.001 (aka: 13150256055001), seen from the bench

The Omega Constellation Manhattan 25 Quartz Sedna Gold (ref. 131.50.25.60.55.001) is a compact 25mm timepiece featuring the iconic four griffes that characterize the Constellation line since 1952. It houses the Omega 4061 quartz movement and features a domed sapphire crystal with integrated 16mm lug width. The Sedna Gold case, a proprietary Omega alloy combining yellow gold and copper, offers warmth and durability resistant to fading typical of traditional gold.

Frequently asked questions

What is the lug width of the Omega Constellation 131.50.25.60.55.001?

The lug width of the 131.50.25.60.55.001 model is 16mm. This width is integrated into the case structure and represents the standard for all examples of this reference. Before ordering a strap, make sure to correctly measure the distance between the case lugs where the strap sits: for this model, the value must be 16mm.

What type of strap is best suited for the Constellation 131.50.25.60.55.001?

For a 25mm Sedna Gold watch, high-end alligator straps (fine grain), vegetable-tanned calf, or shell cordovan are recommended for formal elegance. The material should be at least Semi-Alligator to preserve the value of the case. The choice depends on usage: business/formal suggests alligator or cordovan, daily wear prefers structured calf. Milano Straps offers all these customizable options.

How do you change the strap on an Omega Constellation 131.50.25.60.55.001?

The strap can be removed by gently disengaging the ends from the case lugs, usually with small dedicated tools or by carefully flexing the case. If you lack experience, the Casati Milano atelier offers professional installation service, ensuring perfect positioning and secure fastening without risk to the case.

Can I use an aftermarket strap on this model?

Yes, provided the strap has exactly 16mm lug width and proportions that are consistent with the compact 25mm case diameter. Milano Straps offers artisanal compatible straps, specifically designed for watches of this size, ensuring both mechanical compatibility and aesthetic harmony.

How long does a natural leather strap last on a watch like this?

A high-quality leather strap (alligator, calf, shell cordovan) with vegetable tanning lasts an average of 3-5 years with moderate daily use. Durability depends on water exposure, perspiration, and climatic variations. Straps made by Casati Milano come with an 18-month warranty and can be restored or replaced. Minimal maintenance (quick drying after bathing, avoiding prolonged soaking) significantly extends the life of the material.

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