Strap for Constellation Quartz 27 Brushed Stainless Steel / Yellow Gold / Diamond / MOP Supernova

The lug width of the 123.25.27.60.55.004 model is 18 millimetres. This measurement is essential to ensure that any aftermarket strap fits correctly into the lateral slots of the case. You can verify it by directly inspecting the attachments on your watch with a digital calliper or by contacting a trusted watchmaker.

To enhance the mother-of-pearl and yellow gold, we recommend white or ivory alligator with a yellow gold deployant clasp, or vegetable-tanned calf in champagne tone. These combinations maintain chromatic coherence and allow the dial to shine. For a noble contrast effect, cognac or burgundy shell cordovan creates visual dynamism without weighing down the overall look. The choice depends on the occasion and your aesthetic preferences.

To change the strap, use a spring bar tool to gently compress the internal spring that keeps the strap anchored to the lugs. Insert the tip of the tool into the designated hole in the spring and compress downward, then slide the old strap outward. Insert the new strap by aligning it with the spring and release carefully. If you prefer, entrust the task to a qualified watchmaker, especially considering the value of your model.

Yes, a high-quality aftermarket strap with an 18mm lug width is perfectly compatible with your Omega Constellation. What matters is verifying that the width is correct and that the chosen material (alligator, calf, shell cordovan) does not clash negatively with the mother-of-pearl and yellow gold of the case. Milano Straps offers customizable straps ready for shipment and a bespoke service at the Casati Milano atelier.

The durability of a leather strap depends on the material, tanning, and use. A high-quality artisanal alligator or shell cordovan lasts on average 3–5 years with daily wear; a vegetable-tanned calf 2–4 years. Factors such as exposure to moisture, sun, and sweat accelerate aging. Subjecting the strap to regular maintenance (gentle cleaning, conditioning) and alternating it with other straps significantly extends its lifespan. Milano Straps offers an 18-month warranty on every artisanal strap handcrafted at Casati Milano.