Strap for PRS 516 Chronograph Quartz Stainless Steel / Black / Bracelet

The lug width is 20mm. It is measured internally, from shoulder to shoulder of the case, excluding any rubber guards. This dimension is standard for 42mm sports watches and allows aftermarket straps to be fitted without critical tolerances.

The choice depends on use: vegetable-tanned alligator for formal elegance with robustness, shell cordovan for durability and ageing patina, NATO polyamide for chromatic versatility and quick change, FKM rubber for water use and sports activity. The 42mm case geometry requires consultation with Atelier Casati Milano to balance thickness and visual texture.

The strap is removed via spring bars. Use a dedicated tool to push the bar inward, freeing the lug end. Insert the new strap into the seat, verifying that the bar clicks into position. Do not force: ceramic lugs can chip if subjected to localised pressure. If in doubt, consult a specialist.

Yes. MilanoStraps uses leathers and materials certified to high durability standards. However, given the mass of the 42mm case and spring bar tension, it is advisable to verify with Casati Milano the compatibility of the thickness and rigidity of the keeper to avoid excessive play on the lugs.

An alligator or vegetable-tanned calf strap, subjected to daily wear on a 42mm chronograph, has an average life of 18–36 months. Wear occurs in the keeper (point of maximum tension) and at skin contact. Shell cordovan, thanks to fibrous structure, can last 4–5 years. Regular maintenance (conditioning every 6 months) significantly extends longevity.