Strap for Constellation Co-Axial 38 Stainless Steel / Red Gold / Diamond / Silver

The lug width of the Constellation 123.25.38.21.52.001 is 18mm, the historic standard of the collection. This measurement represents the classic proportion for 38mm cases and is fundamental for choosing a compatible strap. Always verify with a digital caliper, measuring from outer edge to outer edge of the lug shoulder.

For a red gold and steel case, we recommend dark brown or burgundy alligator, vegetable-tanned calf in cognac tones, or whiskey-colored shell cordovan. These materials enhance the warmth of the red gold and create subtle contrasts with the brushed steel. Avoid excessively light straps that would lose contrast against the case.

The Constellation 123.25.38.21.52.001 uses standard double-hole attachments. Use a professional spring bar remover to gently lift the primary pin. The lugs (the four decorative points) remain fixed to the case: the strap is inserted between the lug and the lug shoulder. Reposition the pin with even pressure, ensuring it is fully inserted.

Yes, any strap with 18mm lug width is compatible. However, consider proportions and material: for a 38mm bimetallic case, choose thicknesses between 3.5 and 4.5mm and premium materials (alligator, vegetable-tanned calf, shell cordovan). Our custom-made straps from Milano Straps fit perfectly with the historic dimensions of this Constellation.

A high-quality vegetable-tanned leather strap (such as our Italian calf) lasts 3–5 years with moderate daily use, developing patina and character. With occasional use (2–3 times weekly), it can reach 7–10 years. Aging is aesthetic and does not compromise functionality. Shell cordovan and alligator have slightly longer durability due to their more robust fibrous structure. Regular maintenance and rotating multiple straps significantly extend longevity.