Omega · Constellation

Strap for Constellation Quartz 27 Brushed Stainless Steel / Yellow Gold / Wavy MOP

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter27 mm
Reference123.20.27.60.55.005 (aka: 12320276055005)
FamilyConstellation
MovementOmega caliber 1376 hours, minutes
CaseMother of Pearl | Yellow Gold, Stainless Steel

Recommended spring bar

Spring bars Omega Speedmaster Seamaster 19mm

Technical match for lug width and diameter · lug 19 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Constellation 123.20.27.60.55.005 (aka: 12320276055005)

Selected for the 19 mm lug width

All 19 mm straps →

The Constellation 123.20.27.60.55.005 (aka: 12320276055005), seen from the bench

The Omega Constellation model 123.20.27.60.55.005 is a 27mm women's watch combining stainless steel and 18-karat yellow gold, powered by the reliable Omega 1376 quartz movement. It features a natural mother-of-pearl dial with champagne and pearl white tones that shift with viewing angle. The watch requires a 19mm lug width strap for proper fit, as the lugs are integrated into the case structure.

Frequently asked questions

What is the lug width of the Omega Constellation 123.20.27.60.55.005?

The lug width of the Constellation 123.20.27.60.55.005 is 19mm. This value represents the space between the integrated lugs on the case and determines the exact width of the compatible strap. Measure the lug width perpendicularly with a digital caliper at the section where the strap adheres to verify the value.

What strap material is best suited for the Constellation with a mother-of-pearl dial?

For the Constellation 123.20.27.60.55.005 with natural mother-of-pearl dial, a fine-grained alligator is the most balanced choice: the regular texture of the leather dialogues with the pearlescent luster without overwhelming it. Elegant alternatives are vegetable-tanned calf leather (cream or white color to emphasize the dial) or shell cordovan (ivory color for tonal harmony).

How do I change the strap on the Constellation 123.20.27.60.55.005?

The Constellation 123.20.27.60.55.005 uses standard spring bar lugs. Obtain a spring bar tool or similar instrument, insert it into the small lateral hole of the lug, gently lift the spring bar and the strap will disengage. Insert the new 19mm strap onto the freed spring bar and press it until you hear the securing click.

Can I use an aftermarket custom strap on the Constellation 123.20.27.60.55.005?

Yes, any custom-made strap with a 19mm lug width is perfectly compatible. Consult specialized ateliers such as Casati Milano to personalize your strap in leather, exotic leather, rubber or NATO, choosing color, stitching thread and deployant clasp according to your style.

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

A premium leather strap (alligator, shell cordovan, calf leather) worn daily on an elegant timepiece such as the Constellation typically lasts 3-5 years, with natural development of patina and fiber aging. Wear accelerates if exposed to sweat, salt water or direct heat. The 18-month warranty covers any stitching defects; after this period, annual maintenance (thread repair, buckle replacement) extends the strap's lifespan.

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