Omega
Constellation 1203.10.00— lug 18mm

The Omega Constellation 1203.10.00 features an 18-millimetre lug width. This measurement refers to the internal distance between the two case lugs and is crucial for selecting a compatible aftermarket strap. It is measured by positioning a digital caliper perpendicular to the lateral flanges, from inside to inside, excluding the case material itself.

The best choice depends on usage and personal preference. For formal occasions, we recommend black or dark brown alligator to enhance the elegance of the griffes and polished case. For daily wear, vegetable-tanned calf leather offers comfort and durability with a patina that evolves naturally over time. For versatility, a NATO or rubber strap allows quick transitions between casual and professional contexts without aesthetic compromise.

Obtain a quality spring bar tool for extraction. Position the watch on a soft surface with the dial facing downward. Insert the flat tip of the tool under the connecting pin between the case and strap, gently applying leverage upward until the pin retracts enough to be removed. Repeat on the other side. Insert the new pins into the aftermarket strap and reinsert them into the case lugs, ensuring they are firmly positioned.

Yes, provided the measurement is correctly verified at 18 millimetres (inside to inside of the lugs). Quality artisanal straps such as those offered by Milano Straps are constructed for this specific width and fit perfectly onto the Constellation's lugs. Avoid generic straps from unknown brands: they may present imprecise tolerances that compromise both the aesthetics and security of the watch.

Durability depends on usage, care, and material. A quality artisanal alligator or shell cordovan strap lasts 4-7 years with moderate daily use and regular maintenance (gentle cleaning, avoiding prolonged water exposure). Vegetable-tanned calf leather has similar longevity but may require replacement sooner if exposed to humid environments or intense perspiration. Rubber or NATO fabric straps are more durable but still wear after 5-8 years, depending on usage intensity.