Strap for Formula 1 x Indy 500

The lug width is 20mm. This measurement represents the distance between the inner lugs of the case and is standard across all colour variants of the CAZ101AR.BA0842 reference. Always verify with a digital calliper or ruler positioned at the inner lug extremities before ordering an aftermarket strap.

For the Formula 1 CAZ101AR.BA0842, an alligator strap with vegetable tanning represents the most balanced choice aesthetically and functionally. Alligator delivers formal elegance whilst maintaining the chronograph's sporting character and creates natural visual contrast with the ceramic bezel. Alternatively, chromium-tanned calf leather offers versatility in both professional and outdoor environments, whilst FKM rubber is the technical choice for frequent water sports practitioners.

The strap is replaced by removing the spring bars that connect the strap to the case lugs. Use a dedicated tool or gentle fingernail pressure to push the bar towards the strap and extract it. Once the old strap is removed, position the new strap on the lugs and reinsert the spring bars until they click into place. If uncertain, consult a professional watchmaker to avoid scratching the case.

Yes, any strap with a 20mm lug width is compatible with the CAZ101AR.BA0842. Quality artisanal aftermarket straps offer advantages over the original: colour customisation, premium leather selection, bespoke adjustment possibilities and often superior value for money. Ensure the new strap is robust enough to support the weight of the 43mm case and internal movement.

Leather strap lifespan depends on material type, frequency of wear and environmental conditions. A chromium-tanned calf or vegetable-tanned alligator strap typically lasts 3–5 years with daily wear. Prolonged exposure to humidity, chlorine and sunlight shortens useful life. Straps crafted by Casati Milano carry an 18-month guarantee, though with proper maintenance (regular cleaning and protection from excessive moisture) longevity can be extended significantly.