Strap for Master Collection 40 Chronograph Calendar Stainless Steel / Black / Bracelet

The lug width is 21 mm. This measurement is critical for visual balance between the 40 mm case and strap. Always verify the lug width before ordering an aftermarket strap by measuring the distance between the lug pins on the case.

It depends on intended use. For formal elegance, cognac alligator or black shell cordovan develop rich patina and offer tactile comfort. For daily versatility, vegetable-tanned calfskin in medium brown or pearl grey balances durability and aesthetics. For sport-casual wear, FKM rubber in dark grey or NATO in blue maintains the dress-watch identity without sacrificing practicality.

The process is straightforward: obtain a pin remover tool, unscrew or extract the lower pin from each lug, remove the old strap, insert the new strap aligning the holes, reinsert the pins, and verify tension. If inexperienced, consult a professional watchmaker or Casati Milano's WhatsApp service.

Yes. Any strap with a 21 mm lug width is compatible. We recommend specialised artisans like Casati Milano, who guarantee premium materials (alligator, shell cordovan, vegetable-tanned calfskin) and precise finishing. Avoid generic low-quality straps that compromise aesthetics and durability.

A quality strap with vegetable tanning or alligator leather lasts 4–7 years with moderate daily use. Shell cordovan, being denser, extends lifespan to 8–10 years. Longevity depends on humidity, sun exposure, usage frequency, and care. Casati Milano provides 18-month warranty on all bespoke straps.