Strap for Constellation Master Chronometer 36 Yellow Gold / Silver / Bracelet

The lug width of the Constellation 131.50.36.20.02.002 is 22 millimetres. This measurement represents the distance between the two internal attachment points of the spring bar. Measuring it correctly is essential for selecting a compatible strap: position a calliper between the two inner edges of the lug to obtain an accurate measurement. A width of 22 mm is a standard size, widely supported by European artisanal strap manufacturers.

Alligator represents the most elegant and complementary choice for the Constellation in yellow gold. The natural texture of alligator, with its regular oblong compartments, visually harmonises with the refinement of the case. A chocolate brown alligator amplifies the warmth of the gold, creating chromatic continuity; black alligator instead creates a sophisticated contrast. Calf leather is a versatile alternative, available in various shades (blue, burgundy, grey), suitable for both formal and informal settings. For those preferring sporty solutions, a canvas NATO strap intentionally contrasts with the elegance of the case, imparting contemporary energy.

To change the strap on your Constellation 131.50.36.20.02.002, you will need a small tool (hammer and punch, or a dedicated change tool). Observe the inside of the current strap: you will notice two small spring bars in the lugs of the case. Insert the punch into the small notch on the spring bar, pressing gently to retract the spring, then remove the strap. Repeat the operation on the other side. To install the new strap, align the holes with the case lugs, insert one end of the spring bar into the hole, then press gently until you hear a click. Repeat on the other side. If you prefer to avoid any risk, contact the Casati Milano atelier for professional installation.

Yes, numerous aftermarket straps are compatible with the Constellation 131.50.36.20.02.002 thanks to the standard 22 mm lug width. Milano Straps offers a selection of 22 mm straps in alligator, calf, shell cordovan and canvas, all tested for compatibility. The Casati Milano atelier furthermore offers the possibility to create bespoke straps with personal choice of leather, personalizations with initials and stitching thread, guaranteeing a result built specifically for your timepiece. A quality aftermarket strap does not compromise the value of the watch, rather it enhances it by allowing aesthetic versatility.

The lifespan of a leather strap depends on frequency of use, material and environmental conditions. A high-quality alligator strap, worn daily, has an estimated useful life of between 3 and 5 years before showing signs of significant wear (tears, cracks in the leather). Calf leather tends to resist slightly less, with similar duration but greater visibility of micro-abrasions. Shell cordovan, being more resistant, can last up to 7-8 years. Exposure to water, direct heat and prolonged humidity accelerates deterioration. Milano Straps and the Casati Milano atelier guarantee a minimum duration of 18 months on all straps made, but with proper maintenance (periodic cleaning, drying after accidental water contact) the life of the strap extends considerably.