Omega · Constellation
Strap for Constellation Co-Axial 35 Red Gold / Diamond / Silver
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 123.55.35.20.52.001 (aka: 12355352052001)
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 123.55.35.20.52.001 (aka: 12355352052001), seen from the bench
Frequently asked questions
What is the exact lug width of the Omega Constellation 123.55.35.20.52.001?
The lug width is precisely 20mm. This dimension is determined by the distance between the two integrated lugs built into the case. To verify correctly, place a digital caliper from the inner edge of one lug to the other: the result must be 20mm. It is essential to measure from the center of the lugs to ensure complete compatibility with artisanal straps.
Which strap material is most suitable for the Constellation in rose gold?
Cognac or dark brown alligator is the classic choice that emphasizes the warmth of rose gold. However, vegetable-tanned calf leather offers natural aging and greater sustainability, while cordovan guarantees superior scratch resistance for daily wear. FKM rubber remains ideal for informal contexts where elasticity and practicality are priorities. The choice depends on your lifestyle: formal elegance, evolution over time, or modern practicality.
How do you change the strap on a Constellation with integrated lugs?
The Constellation's integrated lugs require a different approach than standard straps. The strap's keeper must be positioned under the case's integrated lugs, then slid laterally until mechanical locking is achieved. It is not necessary to remove the lugs themselves. We recommend performing this operation with appropriate equipment or relying on Casati Milano to avoid damage to the lugs: the procedure is simple but requires precision.
Can I use a non-official Omega aftermarket strap on the Constellation 123.55.35.20.52.001?
Yes, provided it is made with a 20mm lug width. Artisanal straps from Milano Straps are completely compatible with this model and offer construction quality and finishes often superior to factory products. The important thing is to verify that the keeper slides smoothly under the lugs and that there is no lateral play once mounted. All 20mm straps from the collection are tested for this compatibility.
How long does natural leather strap last on a luxury watch like the Constellation?
A quality leather strap, exposed to moderate daily use, typically lasts 3-5 years. Durability depends on exposure to moisture, heat, perspiration, and cleaning frequency. Vegetable-tanned materials develop a natural patina that makes them more appealing over time but requires maintenance: monthly cleaning with a damp cloth and conditioning with natural waxes every 6-8 months. Cordovan, due to its superior density, can last up to 7-8 years. Casati Milano offers an 18-month warranty on every personalized strap.
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

