Strap for PrimaLuna Automatic 26.5 Pink Gold Diamond Leather

The lug width of the Longines PrimaLuna L8.111.9.78.2 is precisely 6mm. This is a micro-engineered dimension requiring accuracy—do not confuse with 5.5mm or 6.5mm variants. We recommend verifying with a digital calliper before purchasing a strap, measuring the space between the internal shoulders of the case lugs in rose gold.

For a 26.5mm rose gold case, alligator leather represents the pinnacle of refinement: the tapered texture and fine grain enhance the golden hue. Recommended colours: dark brown, cognac, burgundy. As an elegant alternative, high-grade vegetable-tanned calf offers natural character. For daily versatility, silk NATO straps or certified FKM rubber provide practicality without aesthetic compromise.

Strap replacement requires specialised tools: a spring bar tool and a protected flat surface. Remove the original strap by pushing the lateral pins inward to release the springs. Insert the new strap by aligning the holes with the case pins, pressing until the clasp engages. Given the delicacy of the rose gold case, we recommend consulting a professional watchmaker or Casati Milano atelier to prevent damage.

Yes, any strap with a 6mm lug width is compatible with the PrimaLuna L8.111.9.78.2. However, the delicate proportions of the case (26.5mm diameter) demand straps of equivalent quality—avoid substandard materials that visually overwhelm the watch. The thickness of the strap (3–4mm) must remain proportionate to the case. Always verify that the strap does not protrude beyond the case edges.

A certified alligator or calf strap with vegetable or tannin tanning typically lasts 3–5 years of regular use, depending on frequency and moisture exposure. The rose gold of the PrimaLuna does not oxidise leather as ferrous metals do, reducing chemical degradation. To extend lifespan, avoid prolonged water immersion and occasionally apply a specific leather conditioner. Casati Milano atelier offers 18-month warranty and periodic maintenance services.