Strap for BelleArti 24.6 Stainless Steel Diamond

The lug width of the Longines Heritage L2.501.0.83.6 is 15mm. This measurement is critical for strap compatibility. To verify it correctly, measure the distance between the two metal pins (small protrusions that hold the strap on either side of the case): it must be exactly 15mm. This specification ensures a precise fit between case and strap with no lateral play.

For the Longines Heritage L2.501.0.83.6, alligator leather represents the finest choice. Its regular natural grain and smooth surface amplify the case's refinement without competing with the guilloché dial. Alligator ages beautifully, developing a patina that deepens the original colour. Alternatively, vegetable-tanned calf offers superior softness and comfort with an equally understated appearance, whilst shell cordovan delivers compact structure and intrinsic lustre that echoes the model's vintage era.

Strap replacement requires a specific tool: a spring bar tool. Place the watch on a soft surface, insert the tool's tip into the tiny opening beneath one of the pins, apply gentle pressure to lift the internal spring, and the pin releases from the old strap. Repeat on the other side. Then insert the pins into the new strap, ensuring the springs click firmly into position. If you're unfamiliar with this operation, Casati Milano's atelier performs this service with professional precision.

Yes, provided the strap is specifically designed for 15mm lugs. Milanostraps.it offers a complete collection of 15mm-compatible straps, from alligator models to vegetable-tanned calves, shell cordovan to silk NATO. Compatibility is guaranteed by matching the lug width (15mm) to the distance between the pins of the new strap. All straps are customisable in length, initials and thread colour to fit your wrist perfectly and match your aesthetic preferences.

Durability depends on material and use. Alligator or shell cordovan, with proper care, can last 8–12 years whilst maintaining excellent appearance. Vegetable-tanned calf offers 5–8 years of useful life whilst developing a fascinating patina. Longevity increases significantly if the strap is protected from excessive moisture and prolonged direct sunlight. A bespoke strap from Casati Milano includes an 18-month warranty and can undergo extraordinary maintenance (stitch reinforcement, edge re-finishing) to further extend its functional life.