Strap for Perpetual Calendar Split Seconds Chronograph 5004G Salmon

The lug width of the 5004G_Salmon is 20mm. This measurement is calculated from the inner base of one lug to the other, passing through the bottom of the white gold case. It is essential to verify that any aftermarket strap is certified for this specific measurement, as even a tolerance of 0.5mm would result in imprecise case adjustment.

For the 5004G_Salmon, we recommend alligator in dark brown or cognac, as the natural grain of the leather harmonises beautifully with the white gold case and salmon dial. Alternatively, vegetable-tanned calf or shell cordovan offer a patina that ages gracefully. NATO straps are not recommended: the canvas width would create a visual imbalance with the case proportions.

Changing the strap requires specific tools: a spring bar extractor and a magnifying lens. Position the watch with the case parallel to the table, locate the lugs and gently insert the spring bar extractor to compress the internal spring. Once the lug releases from the case lugs, you can extract the old strap and insert the new one. For a Grand Complications like the 5004G_Salmon, we recommend entrusting this operation to a professional.

Yes, provided the aftermarket strap is specifically certified for the 20mm lug width. A quality artisanal strap, crafted from alligator, cordovan or vegetable-tanned calf, guarantees structural integrity equivalent to the original. We recommend straps from specialised suppliers such as Casati Milano, which offer personalised consultation and warranty against manufacturing defects.

The lifespan of a leather strap depends on frequency of use and the material chosen. Quality alligator or calf can last 3-5 years with daily wear before requiring replacement. Shell cordovan, thanks to its natural density, can reach 5-7 years. Factors such as sun exposure, humidity and temperature affect ageing. A well-maintained strap, protected from excess sweat and moisture, ages nobly, developing a patina that increases the aesthetic value of the watch.