Strap for Constellation Co-Axial 38 Stainless Steel / Silver

The Omega Constellation 123.10.38.21.52.001 features a standard lug width of 20 millimetres. This measurement represents the distance between the inner edges of the two lugs (the protrusions that anchor the strap). Precision is essential: an error of even half a millimetre causes unstable attachment. To verify it, measure the space between the lugs at 12 o'clock and 6 o'clock with a digital calliper.

For the Constellation 123.10.38.21.52.001 we recommend alligator in vegetable tanning (medium brown or black) or bordeaux shell cordovan. Alligator respects the dress heritage of the line thanks to its regular texture and the natural patina that develops over time. Shell cordovan, more structured and naturally lustrous, emphasises the sober sporting character. Vegetable-tanned calf leather remains the most versatile choice for daily wear. We advise against NATO: the minimalist profile of the Constellation requires proportionate straps, not in aesthetic competition with the case.

You will use a springbar remover tool or a suitable instrument. Position the watch on a soft surface (cotton cloth) with the dial facing down. Insert the tip of the springbar remover into the groove of the spring lug, lift gently to free it from its seat, then remove the old strap. For the new one: align the hole of the bar with the lug, press gently until it clicks into position. Repeat on the other side. Verify that the strap is parallel to the case and not twisted.

Yes, as long as the lug width is exactly 20 millimetres and the strap has been made according to serious quality standards. Handcrafted straps in alligator, shell cordovan, calf and FKM rubber are fully compatible. Be wary of poor quality straps: the reduced cost often hides imprecise finishes that compromise fit and safety. The Casati Milano atelier supplies made-to-measure straps for your Constellation with personal leather selection and 18-month warranty.

Durability depends on usage, tanning, leather quality and the wear you expose it to. High-quality alligator or shell cordovan in vegetable tanning typically lasts 5-7 years if worn irregularly (3-4 days a week). With daily and continuous use, durability drops to 2-3 years. Critical factors: humidity and perspiration accelerate wear, while regular maintenance (gentle cleaning, drying) extends it. Handcrafted natural leather straps can be regenerated and reconditioned; some enthusiasts keep the same straps for decades, replacing only the deployant clasp.