Strap for Royal KonTiki Chronograph Strap

The lug width of the 7755.40.50.1289 model is exactly 20mm. This measurement represents the internal space between the case lugs and is essential for selecting compatible aftermarket straps. Any strap must comply with this measurement within a maximum tolerance of ±0.3mm to ensure proper fit to the lugs and wrist stability.

The choice depends on usage context and material preferences. For formal environments or daily wear, we recommend brown alligator or vegetable-tanned calf, both developing natural patina over time. For sporting vocations, a charcoal grey or black nylon NATO strap enhances the chronograph's functionality. For moisture resistance, synthetic rubber represents the most pragmatic solution.

The strap can be removed by unscrewing the lateral case lugs using a specialised tool (removable pins). Milano Straps provides detailed tutorials and pre-purchase technical support. Alternatively, Atelier Casati Milano offers on-site replacement service, guaranteeing precision and zero risk to the case.

Absolutely, provided it respects the 20mm lug width. Milano Straps offers a certified selection of straps for this width, crafted in premium leather or synthetic materials, all tested against the original case geometry. Compatibility is guaranteed by the specific 20mm measurement.

A quality leather strap, subjected to daily use, maintains structural integrity between 3-5 years depending on tanning method (vegetable-tanned ages more rapidly, alligator remains stable longer). Routine replacement becomes necessary when the leather begins to deteriorate, typically after 18-24 months of intensive use. Milano Straps offers matched replacements to ensure aesthetic continuity over time.