Strap for Saint-Imier Date 38.5

The lug width is precisely 20mm. You can verify this by measuring with a calliper or ruler the inner space between the lugs of the case—the two elliptical recesses on either side. This measurement ensures correct proportioning between the 38.50mm case and the strap according to Swiss classical watchmaking standards.

Genuine alligator represents the ideal choice: its regular small-scale texture does not visually compete with the rose gold-stainless steel bicolour case, instead amplifying the chromatic contrasts. Alternatively, calf leather in cognac or dark brown communicates refined elegance with natural ageing over time.

The Saint Imier L2.763.5.72.7 features removable spring bars. Use a dedicated spring bar remover tool to extract them gently by pressing upward. Insert the new spring bars into the aftermarket strap ensuring the lug width is exactly 20mm, then secure the strap to the case. If equipped with an integrated deployante, verify compatibility with the Longines proprietary system.

Yes, provided the lug width is strictly 20mm. Also verify the mounting system: certain Saint Imier references feature integrated deployante with proprietary pins. High-end bespoke leather straps adapt without difficulty to standard Longines systems. Avoid deviations of 0.5mm, which would cause mechanical play or prevent mounting.

Genuine alligator or shell cordovan strap guarantees 3–4 years with moderate daily wear. Calf leather, more delicate, resists 2–3 years. Longevity depends on: frequency of wear, UV exposure, body perspiration, tanning quality (vegetable > synthetic). Regular maintenance—cleaning with damp cloth, storage in a dry environment—significantly extends lifespan.