Strap for BelleArti 27.3 Stainless Steel

African alligator remains the most stylistically coherent choice for this model, thanks to the natural patina that develops over time and the tactile softness. However, vegetable-tanned calf leather offers richer grain and more evident ageing. For summer, a fine weave NATO fabric in cotton-polyester maintains the minimalist elegance of the case. The choice depends on intended use: alligator for formal occasions, calf for daily wear, NATO for sporty settings.

The Longines Heritage features standard removable lugs with mobile spring bars. To remove the old strap, simply extract the spring bars from the lugs using a small tool (a watch case opener or the end of a Swiss knife). Position the tool under the spring bar and gently pull outward until it is freed from the lug. Then insert the spring bars of the new strap into the lugs, ensuring they are properly aligned and securely positioned. If you do not have specific tools, a professional watchmaker can complete the operation in minutes.

The durability of a leather strap depends on usage, maintenance and material choice. A high-quality alligator strap lasts approximately 4–6 years of daily use, whilst vegetable-tanned calf leather may last 3–4 years before requiring replacement. Perspiration, sun exposure and contact with salt water accelerate wear. With preventive maintenance (periodic cleaning, storage in dry environments), it is possible to significantly extend the strap's lifespan. Straps crafted by Casati Milano include an 18-month warranty against manufacturing defects.