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 width
Straps for the Constellation 123.20.27.60.55.005 (aka: 12320276055005)
Selected for the 19 mm lug width
Hammered Calfskin Strap Light Blue€98
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered Pink Strap with Ecru Stitching€98
Hammered Yellow Strap with Ecru Stitching€98
Grey Hammered Leather Strap with Ecru Stitching€98
Swift Red Leather Strap€120
The Constellation 123.20.27.60.55.005 (aka: 12320276055005), seen from the bench
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

