Omega · Constellation

Strap for Constellation Co-Axial 35 Stainless Steel / Red Gold / Grey

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter35 mm
Reference123.20.35.20.06.002 (aka: 12320352006002)
FamilyConstellation
MovementOmega caliber 2500 Hours, Minutes, Seconds | Date | Co-Axial Escapement, Chronometer
CaseRed Gold, Stainless Steel

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Constellation 123.20.35.20.06.002 (aka: 12320352006002)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Constellation 123.20.35.20.06.002 (aka: 12320352006002), seen from the bench

The Omega Constellation 123.20.35.20.06.002 is a refined interpretation of the Constellation collection, established since 1952 as Omega's technical and stylistic benchmark. This model features a compact 35mm case diameter, rooted in the "Manhattan" tradition from 1982, with four golden lugs securing the sapphire crystal and a bezel decorated with Roman numerals. The case combines red gold and stainless steel, housing the Omega caliber 2500 automatic movement with Co-Axial escapement and Chronometer certification. The 20mm lug width is engineered precisely to maintain visual proportions on the wrist without oversizing.

Frequently asked questions

What is the lug width of the Omega Constellation 123.20.35.20.06.002?

The lug width of the 123.20.35.20.06.002 model is exactly 20mm, measured between the case lugs. This dimension is specific to this Constellation model and is essential to ensure compatibility with any aftermarket strap.

What is the best strap material for this Omega Constellation?

For the Constellation 123.20.35.20.06.002, we recommend alligator with vegetable tanning (which develops patina over time) or calf leather thicker than 1.4mm. Both materials maintain the formal elegance of the two-tone red gold and steel case, while rubber and NATO straps would appear visually unbalanced on this classic model.

How do you change the strap on an Omega Constellation with integrated lugs?

The integrated lugs of the 123.20.35.20.06.002 require the use of specific tools: a spring bar removal tool. Insert the tool into the hole under the lug, gently push to release the spring bar, and remove the old strap. For the installation of a quality replacement strap, it is advisable to consult an expert to avoid damage to the gold case.

Are there aftermarket straps compatible with this Constellation model?

Yes, any strap with a lug width of 20mm is compatible with the 123.20.35.20.06.002. Milano Straps offers a complete collection of customizable 20mm straps in fine leathers, with vegetable tanning, alligator, and calf options, available ready-made or made-to-order at the Casati Milano atelier.

How long does a leather strap last on a watch like this?

A quality leather strap, with vegetable tanning, has an average lifespan of 5-8 years under normal use conditions. Shell cordovan can last 40-50 years. Durability depends on: water exposure, sweat, frequency of use, and maintenance. A technical rubber strap has a longer lifespan (10-15 years) but less aesthetic character compared to artisanal leathers.

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