Omega · Constellation
Strap for Constellation Quartz 24 Polished Stainless Steel / Red Gold / MOP
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Constellation 123.20.24.60.55.003 (aka: 12320246055003)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€149
Red Alligator Strap Water Resistant€195
Green Rubberized Alligator Strap with Ecru Tribal Stitching€149
Hammered Calfskin Strap Light Blue€98
Vintage Olive Green Calf Leather Watch Strap€80
The Constellation 123.20.24.60.55.003 (aka: 12320246055003), seen from the bench
Frequently asked questions
What is the lug width of the Omega Constellation 123.20.24.60.55.003?
The lug width measures 20 mm. This dimension is specific to this model and determines compatible strap options. It is not a universal standard: the same case diameter (24 mm) could feature 18 or 22 mm lugs on other references. Verify the measurement before ordering your strap.
What is the best strap for this mother-of-pearl ladies Constellation?
The best strap depends on intended use: for jewelled coherence, natural grey alligator enhances the mother-of-pearl dial and Sedna™ rose gold. For aged patina, dark brown shell cordovan creates depth. For versatility, vegetable-tanned white-cream calf allows visible aging. Light grey FKM rubber is ideal for humid environments without aesthetic compromise.
How do you change the strap on a 24 mm Omega Constellation?
Strap replacement is performed via spring bars in the lug attachments. Use a dedicated tool (spring bar tool) or a blunt-tipped needle to compress the spring and release the bar from one side. Fully remove the bar, take off the old strap, insert the new one aligning the holes with the compressed spring, and release. Repeat on the opposite side. For optimal results, have a watchmaker assist you the first time.
Is a 20 mm aftermarket strap compatible with this reference 123.20.24.60.55.003?
Yes, provided it is certified for 20 mm lug width. Verify that the strap has exactly this width and that the spring bars are compatible (standard NATO/1.6 mm pin). On milanostraps.it you'll find the complete 20 mm collection. For non-standard lugs, consult the Casati Milano atelier.
How long does a leather strap last on a wristwatch?
A quality alligator or shell cordovan strap lasts 3–5 years with daily wear, with aesthetic aging starting in the second year. A standard calf strap lasts 2–3 years. Durability depends on: moisture exposure (shower, sweat), frequency of use, tanning quality, and care (drying after getting wet, avoiding perfume directly on the leather). A Casati Milano premium leather strap, with an 18-month warranty, is crafted to exceed these standards.
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

