Omega · Constellation

Strap for Constellation Quartz 27 Brushed Stainless Steel / Red Gold / MOP

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

Lug width18 mm
Case diameter27 mm
Reference123.20.27.60.55.001 (aka: 12320276055001)
FamilyConstellation
MovementOmega caliber 1376 hours, minutes
CaseMother of Pearl | Red Gold, Stainless Steel

Recommended spring bar

Spring bars Omega 18mm — single diameter

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

All Omega spring barsOpen →

Straps for the Constellation 123.20.27.60.55.001 (aka: 12320276055001)

Selected for the 18 mm lug width

All 18 mm straps →

The Constellation 123.20.27.60.55.001 (aka: 12320276055001), seen from the bench

The Omega Constellation model 123.20.27.60.55.001 represents the contemporary evolution of the 1952 original design, featuring a 27.00mm case combining 18-karat red gold and stainless steel. The mother-of-pearl dial shifts between ivory, blue, and rose tones depending on viewing angle, complemented by the iconic applied griffes on the bezel. The watch houses the Omega caliber 1376 movement with hours and minutes display. The 18mm lug width accommodates the strap attachment precisely, maintaining visual harmony with the case proportions.

Frequently asked questions

What is the exact lug width of the Omega Constellation 123.20.27.60.55.001?

The lug width of the Omega Constellation 123.20.27.60.55.001 is precisely 18mm. This measurement corresponds to the internal distance between the two case lugs. It is essential to verify this before purchasing an aftermarket strap to ensure structural compatibility and visual harmony with the case proportions.

What is the best strap for the Omega Constellation 123.20.27.60.55.001?

The best strap for the Constellation 123.20.27.60.55.001 depends on usage and personal preferences. Polished black alligator maintains formal elegance and accentuates the contrast with rose gold; vegetable-tanned calf offers natural patina that evolves over time; rubber ensures daily practicality. The choice must consider the mother-of-pearl dial and the rose gold-steel combination, avoiding materials that compete with the case's preciousness.

How to change the strap on the Omega Constellation 123.20.27.60.55.001?

To change the strap: position the watch with the case facing downward; locate the spring bar pin that secures the strap to the lug; use a pointed tool (spring bar tool) to push the pin retainer inward, releasing the strap from its seat; insert the new strap ensuring the pin is correctly positioned in both seats. Uniform pressure ensures secure fastening without damaging the case.

Is an aftermarket strap compatible with the Omega Constellation 123.20.27.60.55.001?

Yes, any aftermarket strap with an 18mm lug width is compatible with the Constellation 123.20.27.60.55.001. Compatibility is guaranteed by the standardization of lug width. Milano Straps offers 18mm customizable straps in leather, color, and stitching, with warranty. Casati Milano atelier also provides bespoke creations tailored to your specifications with personalized consultation.

How long does a natural leather strap last on an Omega Constellation?

The durability of a natural leather strap depends on frequency of use, tanning method, and environmental conditions. Generally, a quality alligator or calf strap can last 3-5 years with regular use. Aging is not degradation, but evolution: the patina that forms over time adds character. Milano Straps guarantees 18 months on craftsmanship; periodic maintenance (cleaning, conditioning with specific creams) significantly extends longevity.

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