Strap for Constellation Co-Axial 38 Day-Date Yellow Gold / Diamond / Silver

The lug width is 20mm. This measurement is specific to the current generation of the Constellation. To verify it, use a caliper to measure the distance between the two attachment lugs on the case: you will get exactly 20mm. Do not confuse this with the total circumference of the strap, which depends on your wrist size.

Brown or black alligator is the natural choice for yellow gold: the material contrast between the scales of the skin and the smooth finish of the gold creates a visually balanced composition. Vegetable-tanned calf leather offers a more uniform grain and a more formal appearance. For those seeking lightness, a NATO military-grade or FKM rubber are modern solutions that respect the case design.

Use a spring bar removal tool to disengage the small metal pins at the ends of the case. Position the tool under the pin, lift slightly, and the pin will retract allowing you to remove the old strap. Insert the new strap by aligning the holes at the ends, then push the pin until you hear a click. If you are not confident, contact an authorized Omega service center.

Yes, any strap with a 20mm lug width is compatible. However, construction quality varies significantly. Handcrafted leather straps offer better aesthetic retention compared to mass-produced straps, and allow customizations in color, stitching, and grain that enhance the value of a yellow gold watch. Straps from milanostraps.it are constructed to artisanal standards and guaranteed for 18 months.

Durability depends on the material, use, and maintenance. A high-quality alligator with vegetable tanning typically lasts 3-5 years with daily wear, developing a fascinating patina over time. Shell cordovan, thanks to the fiber structure of horse leather, can last 10+ years. Calf leather varies from 2-4 years. External factors such as perspiration, sun exposure, and humidity accelerate aging. Occasional maintenance — gentle cleaning with a soft cloth — significantly extends the life of the strap.