Strap for Constellation Manhattan 28 Quartz Stainless Steel / Sedna Gold / Silver

The lug width of reference 131.20.28.60.02.001 is 18 millimetres. This dimension is specific to the compact Constellation: it is measured from the inner centre of one lug to the inner centre of the other. Being 18mm, it excludes most standard straps (which are typically 20mm or 22mm) but allows complete compatibility with our bespoke straps crafted to this specification.

Vegetable-tanned alligator with dark brown or burgundy tones represents the ideal choice to enhance the balance between the Sedna Gold and the steel case. The regular texture of alligator creates visual harmony with the characteristic claws of the Constellation, while the natural patina of vegetable tanning improves over time, adding character to your watch. Alternatively, shell cordovan offers superior resistance and unmatched colour depth.

Changing the strap on the Constellation 131.20.28.60.02.001 requires the use of a spring bar tool, available in professional version from craftsmen or in compact format for personal use. Position the watch on a soft surface (microfibre cloth) with the lugs facing upwards. Insert the spring bar tool into the small lateral hole of the lug, gently press the small internal spring to release it and slide out the old strap. Proceed identically with the second lug, then thread the new strap through the holes and check that the terminals are perfectly seated. If you prefer a safe procedure without risk, the Casati Milano atelier performs the change with personalised consultation.

Yes, your Constellation with 18mm lug width is perfectly compatible with aftermarket straps of the same width. Our collection of 18mm straps in alligator, calf, shell cordovan and other premium materials has been developed specifically for Constellation models like your reference 131.20.28.60.02.001. Choose the material and colour according to your style, and you will be able to transform the daily appearance of your watch while keeping its mechanical integrity intact.

A quality bespoke leather strap (vegetable-tanned alligator, calf or shell cordovan) lasts between 3 and 7 years, depending on daily use, exposure to perspiration and climatic humidity. A strap worn 5 days a week in a dry environment can last 5-7 years, while one subjected to daily stress (light sports, tropical climates) requires replacement after 3-4 years. Vegetable tanning develops a protective patina over time that extends the strap's life. To maximise durability, use two straps in rotation, allowing the leather to breathe between uses.