Strap for Calatrava 5077P Bhutan Textiles

The lug width of the Calatrava 5077P-103 is 18 millimetres. This dimension is specific to this model and represents the internal distance between the two strap attachment points on the case. To measure accurately, position a ruler perpendicular to the case, aligned with the lugs: the result must be exactly 18 mm. It is essential to respect this measurement to ensure secure attachment and harmonic proportion between the 37 mm case and the strap.

For the Calatrava 5077P-103 in platinum, we primarily recommend Mississippi alligator: its geometric and regular grain naturally dialogues with the formal cleanliness of the case. Alternatively, shell cordovan (horse leather) offers superior density to calf and a patina that develops beautifully over time. For a sustainable choice, vegetable tanning allows natural oxidation. Smooth French calf represents a compromise of immediate comfort and chromatic neutrality.

The Calatrava 5077P-103 is fitted with an integrated solid platinum bracelet, not interchangeable lugs. However, if you wish to experiment with a leather strap temporarily, you can use a rubber or leather passante threaded around the lug. For a more elegant and stable solution, rely on Casati Milano: our craftsmen can create a strap with attachment measured to your 18 mm lugs, to be worn alternately with the original bracelet without damaging the case.

Yes, aftermarket straps compatible with the Calatrava 5077P-103 must have an 18 millimetre lug width. At Casati Milano we produce handcrafted 18 mm straps in various materials — alligator, shell cordovan, vegetable tanning, French calf — custom-made to your wrist size and colour preferences. Every strap includes an 18-month warranty against manufacturing defects and is crafted in our Milan atelier. Visit the 18 mm strap collection to discover available options online.

The lifespan of a leather strap depends on the material and usage. High-quality alligator, such as that used in our straps, typically lasts 5–7 years with daily wear. Shell cordovan, thanks to the density and molecular structure of horse leather, can last 7–10 years before requiring replacement. Straps in vegetable tanning, although aging naturally, maintain structural integrity for 6–8 years. Factors such as exposure to perspiration, direct light and humidity accelerate wear. Casati Milano recommends periodic maintenance (application of leather balm every 6 months) to extend the longevity of your strap.