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

The lug width of the Constellation 123.20.35.20.02.003 is 20 millimeters. This measurement refers to the internal distance between the two lugs of the case. You can verify it by measuring directly with a digital caliper at the top of the case, or by consulting the Omega warranty certificate provided with your watch.

The ideal strap depends on your use. For formal and evening occasions, we recommend tortora alligator, pearl grey, or black: they convey discreet elegance and pair perfectly with the two-tone rose gold and steel case. For versatile daily wear, vegetable-tanned calf in brown or burgundy tones offers softness and develops a beautiful patina over time. For those seeking sporty practicality, a navy or black NATO strap is robust and contemporary.

The change is straightforward: position your watch with the dial facing down and locate the upper and lower lugs. Using a dedicated tool (spring bar tool) or a small flat-head screwdriver, insert the tip into the small lateral hole on the lug to compress the internal spring. The spring will retract, allowing you to remove the old strap. Repeat on the other side. Then thread the new 20mm strap by inserting one end first, then the other, ensuring that the spring balls lock correctly into the designated holes.

Yes, any strap with a 20mm lug width is compatible. However, we recommend choosing quality-certified straps: Italian calf, alligator, or reliable technical materials guarantee durability and do not damage the case lugs. Milano Straps offers a selection of 20mm artisanal straps, customizable and 100% compatible with your Constellation 123.20.35.20.02.003.

The lifespan varies based on material and use. A premium quality alligator strap, worn daily, typically lasts 5-7 years before requiring restoration or replacement. Vegetable-tanned calf, more delicate, may last 3-5 years. Natural aging (patina) is desirable and adds character—it is not a defect. Milano Straps straps include an 18-month warranty and are crafted from noble leathers that age magnificently, telling the story of those who wear them.