Milano Straps
← Omega

ITENDEFRES

SearchCart
Menu

Omega · Constellation

Strap for Constellation Co-Axial 27 Brushed Yellow Gold Diamond / Champagne MOP

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 diameter27 mm
Reference123.55.27.20.57.002 (aka: 12355272057002)
FamilyConstellation
MovementOmega caliber 8521 hours, minutes, seconds | date | chronometer, co-Axial escapement
CaseYellow Gold

Spring bar

Spring bars for Omega

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

View →

Straps for the Constellation 123.55.27.20.57.002 (aka: 12355272057002)

Selected for the 16 mm lug width

All 16 mm straps →

The Constellation 123.55.27.20.57.002 (aka: 12355272057002), seen from the bench

The Omega Constellation 123.55.27.20.57.002 is a 27mm yellow gold model featuring the iconic four-pronged lugs introduced in 1982. It houses the Omega Caliber 8521 Co-Axial movement with 25,200 oscillations per hour and COSC chronometer certification. The champagne mother-of-pearl dial displays applied gold hour markers and a date window at 3 o'clock. Water-resistant to 100 meters, this dress-luxury piece has a fixed yellow gold bezel and requires a 16mm lug width strap attachment.

Frequently asked questions

What is the lug width of the Omega Constellation 123.55.27.20.57.002?

The lug width of the Omega Constellation 123.55.27.20.57.002 is 16 millimeters. This dimension represents the width of the attachment between case and strap. Always verify with a digital caliper by positioning the measurement on the inner edges of both lugs. A 16mm strap is the only compatible option to avoid gaps or forcing during installation.

What is the best strap for the Omega Constellation 123.55.27.20.57.002?

For the Constellation 123.55.27.20.57.002 in yellow gold, we recommend dark brown or cognac alligator: the pronounced grain complements the dress refinement of the model, and the tone creates harmony with the gold. Alternatively, shell cordovan offers constructive rigidity and temporal patina. For versatile use, black rubber softens formality while maintaining elegance.

How do I change the strap on the Omega Constellation 123.55.27.20.57.002?

Strap replacement requires a spring bar remover – a forked tool that allows compression of the internal spring on the lug. Place the watch on a soft surface, insert the remover into the lower gap of the lug, gently compress the spring, and extract the spring bar. Repeat for the opposite side. Position the new strap by inserting the spring bar into the lug slots and verifying the closure click. If unsure, contact an authorized Omega service center.

Are there aftermarket straps compatible with the 123.55.27.20.57.002?

Yes, any strap with a 16mm lug width is compatible with the Omega Constellation 123.55.27.20.57.002. Custom artisanal straps offer greater material options (alligator, calf, shell cordovan, rubber) and finishes compared to original Omega straps. Always verify that the spring bar has the correct length: for the Constellation, the standard width is 16mm.

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

A quality leather strap, with regular maintenance, typically lasts 3-5 years with daily use. Determining factors: frequency of use, sun and moisture exposure, patina care. Alligator ages better than calf, developing a golden patina. To extend life, avoid prolonged water exposure, apply leather conditioner annually, and rotate between multiple straps. The Casati Milano atelier provides straps with 18-month warranty and maintenance assistance.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only