Strap for Constellation Manhattan 28 Quartz Sedna Gold / MOP - Sapphire / Diamond

The lug width of the Constellation 131.55.28.60.99.002 is 18 mm. This width is standard for the model and is the fundamental measurement for purchasing a compatible strap. Measure the horizontal space between the two lateral lugs of the case to verify: you should obtain exactly 18 mm. The maximum thickness of the strap (the part that enters the lug) should remain around 3–4 mm to avoid internal friction with the case.

Alligator is the premium choice for this model: its natural scale texture creates a refined material contrast with Sedna Gold, and the aged patina tends toward amber tones that amplify the warmth of the alloy. Vegetable-tanned calf is a more versatile and traditional alternative, with regular grain and the ability to develop complex patina over time. For a contemporary sporty aesthetic, high-end rubber straps (Tropic, Bonetto Cinturini) create sharp graphic contrast and maintain the lightweight visual proportion of the 28 mm case.

The Constellation uses a standard internal lug system: insert a spring bar tool (a two-pronged instrument, one flat and one slightly curved) into the small hole located on the inner side of the lug. Press gently inward to compress the central spring of the pin, then extract the pin from its seat. Repeat on the other side. Next, align the new strap with the lugs and reinsert the pins, ensuring they click into position. Do not use sharp tools that could scratch the gold: the spring bar tool is the only instrument required.

Yes, any strap made for 18 mm lug width is compatible with the Constellation 131.55.28.60.99.002. Aftermarket straps (alligator, calf, rubber, fabric) offer a variety of colors and finishes that the integrated bracelet of the standard model does not allow. The important thing is to verify that the strap thickness in the contact area with the lug does not exceed 4–4.5 mm, to avoid mechanical play or friction. At Milano Straps you will find a selection of 18 mm straps ready for shipment or customizable at the Casati Milano atelier with complete personalization options.

The lifespan of a leather strap depends on the tanning method, thickness, climate, and usage habits. A vegetable-tanned calf strap typically lasts 18–24 months with moderate daily use (5–6 days per week). Alligator, having a more compact fiber structure, tends to last 24–36 months. Factors that shorten lifespan include: intense perspiration, uncontrolled water immersion, extreme temperature fluctuations, and repeated creasing in the same area. Straps made at Casati Milano include an 18-month warranty and can be subjected to maintenance (refinishing, replacement of worn parts), extending useful life for years.