Strap for BelleArti 24.6 Pink Gold

The Longines Heritage L2.501.8.83.4 features a lug width of 15mm. This measurement is determined by the distance between the metal pins that connect the strap to the case. Precise measurement is performed using a digital calliper positioned directly between the lugs—it is critical not to measure on the outer surface, where systematic errors of 1–2mm are common.

For this mother-of-pearl dial model, alligator represents the optimal choice: its natural grain and raised texture create visual dialogue with the iridescence without competing for attention. French vegetable-tanned calf offers an elegant alternative with chromatic evolution over time. Shell cordovan straps in black ensure universal formality. NATO and rubber straps remain practical options, sacrificing aesthetic coherence.

Strap replacement requires a tool called a spring bar tool or removedor de barras. Insert the forked tip of the tool under the lug pin, apply downward pressure to release the internal spring, and extract the pin. Repeat on the opposite lug. Insert the new strap's pins into the lugs until the spring locks. For those unfamiliar with the process, the Casati Milano atelier offers professional replacement service.

The 15mm strap is compatible only with watches that feature the same 15mm lug width. It cannot be adapted to watches with different lugs—a 14mm strap would be visibly loose, whilst a 16mm strap would not fully penetrate the attachments, creating unwanted gaps. Always verify the lug width of your specific model before purchase, as even variants within the same family may present different dimensions.

Longevity depends on material and intensity of use. A quality alligator strap, with moderate wear and proper maintenance (drying after humidity exposure, annual conditioning), lasts 5–7 years. Vegetable-tanned calf resists 4–6 years with natural patina that makes it increasingly interesting over time. Shell cordovan straps, among the most durable, frequently exceed 7–8 years. The Casati Milano atelier offers an 18-month warranty on all handcrafted straps.