Omega · Constellation

Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Moonshine Gold - Diamond / Purple Supernova

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter29 mm
Reference131.55.29.20.60.001
FamilyConstellation
MovementOmega caliber 8700 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2024
CaseSedna Gold

Recommended spring bar

Spring bars Omega 18mm — single diameter

Technical match for lug width and diameter · lug 18 mm · Ø 1.8 mm

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Straps for the Constellation 131.55.29.20.60.001

Selected for the 18 mm lug width

All 18 mm straps →

The Constellation 131.55.29.20.60.001, seen from the bench

The Constellation Manhattan 29 Co-Axial Master Chronometer (131.55.29.20.60.001) is a 29mm women's watch featuring a Sedna Gold case and Purple Supernova dial with diamonds. It houses the caliber 8700 Co-Axial movement, certified Master Chronometer with ±0 to +5 seconds daily precision at 15Hz. The 18mm lug width integrates with the iconic integrated bracelet design that defines the Constellation collection since 1952.

Frequently asked questions

What is the lug width of the Omega Constellation 131.55.29.20.60.001?

The lug width of the Constellation 131.55.29.20.60.001 is 18 millimetres. This measurement represents the distance between the inner shoulders of the case lugs and determines which strap is compatible with the model.

Which strap is recommended for the Omega Constellation Sedna Gold 131.55.29.20.60.001?

African alligator with fine grain represents the classic choice for the Constellation Sedna Gold. For a more contemporary style, vegetable-tanned calf or shell cordovan offer alternatives of equal quality. On milanostraps.it you will find compatible 18mm straps, selectable in leather, colour and customisations.

How do you correctly measure the lug width for the Constellation 131.55.29.20.60.001?

The lug width is measured from the inner shoulder of one lug to the inner shoulder of the opposite lug, in a straight line. For the Constellation, this distance is 18mm exactly. Do not measure the outside of the lug, but the actual space the strap must cover. Manufacturing tolerance must be less than 0.5mm to guarantee a perfect fit.

Can I use an aftermarket strap on this Constellation?

Yes, perfectly compatible. Any strap with a lug width of 18mm is geometrically compatible. Custom artisanal straps from Casati Milano guarantee superior construction precision, with hand-stitching and minimal tolerances, making the pairing even more elegant.

How long does a leather strap last on a watch like the Constellation 131.55.29.20.60.601?

A high-quality alligator or calf strap develops patina and ages progressively, but its structural durability varies with use: with daily wear, 3-5 years. Factors such as sun exposure, humidity, perspiration, and frequency of wear accelerate natural ageing. Casati Milano provides an 18-month warranty on all artisanal straps and offers regeneration and restoration services.

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