Strap for Constellation Co-Axial 41 Chronograph Double Eagle Stainless Steel / Black / Rubber

The Constellation 1819.51.91 is equipped with lugs of 18mm width. This measurement is Omega's standard for 41mm diameter models and represents the ideal compromise between mechanical stability and aesthetic versatility. It is essential to verify lug tolerance before purchasing any aftermarket strap: even 0.3mm deviation causes excessive friction or insufficient securing.

American alligator in vegetable tanning is the ideal architectural choice: the tight and regular grain texture enhances the geometric character of the brushed case. Shell cordovan represents the most sophisticated option, developing an amber patina over time that naturally dialogues with oxidized steel. Taurine calf in vegetable tanning offers tactile softness and chromatic versatility, particularly effective in cognac or bordeaux tones.

Strap changing requires a specific tool (spring bar tool) to compress the internal springs at the lugs. Position the watch on a soft surface (microfiber pad), locate the lug slots at 12 and 6 o'clock, insert the tool into the left spring by gently compressing, remove the spring bar, repeat from the opposite side. Insert the new strap by sliding the spring bar until you feel the securing click. Proceed with caution to avoid scratches on the brushed case.

Yes. Any strap with 18mm width is compatible with the Constellation 1819.51.91, provided the internal shoulder respects the ±0.2mm tolerance. Custom-made leather straps guarantee the best mechanical fit. We recommend straps made by Casati Milano or available on milanostraps.it, where tolerance is manually tested before delivery.

Durability depends on material and usage. An alligator or cordovan strap in vegetable tanning, worn daily, maintains structural integrity for 4-5 years. Taurine calf resists 2-3 years with moderate wear. Factors accelerating wear include: prolonged direct sun exposure, constant humidity, sweat, aggressive soap. Proper maintenance (biannual conditioning with natural wax, drying after wetting) significantly extends useful life. A translucent elastomer or rubber strap resists 3-4 years in high humidity conditions.