Strap for Grand Prix de Monaco Historique Chrono Bracelet

The Chopard Classic Racing 158570-3001 features a 20mm lug width, measured between the spring bar attachment points from inner shoulder to inner shoulder. This dimension enables compatibility with dedicated 20mm watch straps and ensures precise geometric fit with the 44.50mm case.

Alligator leather in vegetable tanning, in cognac or burgundy shades, represents the most coherent choice aligned with this model's racing sport-elegant identity. Alternatively, shell cordovan delivers superior durability and develops natural patina over time, whilst NATO straps in grey cordura ensure versatility and modularity for field configurations.

The procedure requires a spring bar tool. Position the bifid end of the tool beneath the lug attachment pin, pressing gently downward to compress the internal spring mechanism. The pin extracts cleanly from the strap; repeat on the opposite side, then align the new strap's attachment holes with the case lugs and re-insert the spring bars. Avoid forceful pressure to prevent damage to the internal passant.

Yes, any strap with a 20mm lug width specification is compatible. Confirm that the thickness at the lug (grain, material width) does not exceed 3.5-4mm to avoid excessive play in the spring bar sockets. Custom-made straps allow additional personalisation of length, stitch type and thread colour for perfect fit adjustment to your wrist.

An alligator or calf strap with vegetable tanning typically lasts 5-7 years under daily wear, developing an increasingly rich patina. Shell cordovan extends durability to 10+ years thanks to the compact fibre structure. Longevity depends on sun exposure, humidity and frequency of wear. The Casati Milano atelier provides 18-month warranty on all custom straps, with maintenance and servicing available.