Omega · Constellation
Strap for Constellation Co-Axial 35 Red Gold / Diamond / MOP Supernova / Rubber
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 123.57.35.20.55.001 (aka: 12357352055001)
Selected for the 20 mm lug width · workshop selection
Black Alligator Strap with Light Blue Edges€210
Black Alligator Strap with White Edges€210
Millenium Cognac Alligator Strap€270
Matte Blue Alligator Strap€270
Green Rubberized Alligator Strap with Ecru Tribal Stitching€185
The Constellation 123.57.35.20.55.001 (aka: 12357352055001), seen from the bench
Frequently asked questions
What is the correct lug width for the Omega Constellation 123.57.35.20.55.001?
The lug width for this model is 20mm (measured from pin to pin). It is essential to verify this dimension before ordering an aftermarket strap, as even 0.5mm tolerance can cause friction during installation. Use a digital caliper perpendicular to the pins for accurate measurement.
Which strap material pairs best with the 35mm Constellation in red gold?
Alligator is the optimal choice for this model: the natural scales dialogue with the grain of the red gold case, and the structural rigidity never competes visually with the case. Matte tonaca alligator ages with a rich patina. Alternatively, vegetable-tanned calf offers versatility and better grip on the wrist, ideal for those alternating formal and leisure contexts.
How do you change the strap on an Omega Constellation 123.57.35.20.55.001?
The change requires extraction of the spring bars. Position the watch face down, locate the small hole on the band of the original bracelet, insert a spring bar remover into the hole to compress the internal spring, extract the pin and repeat on the other side. Insert the pins into the new strap and verify they are correctly locked from both sides.
Is a 20mm aftermarket strap completely compatible with this Constellation?
Yes, a 20mm strap is compatible from a dimensional standpoint. However, the quality of finish and aesthetic matching depends on material and color choices. Artisanal straps in alligator or calf offer superior rendering compared to industrial straps, maintaining better functional value over time.
How long does a leather strap last on a wristwatch like the Constellation?
A quality strap in alligator or calf has a durability of 4-6 years with moderate use and regular maintenance. Shell cordovan lasts longer, even 7-8 years, but requires more attention against humidity. Durability increases if you periodically alternate between multiple straps, reducing the load on each individual specimen.
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

