Strap for PrimaLuna 34 Automatic Moonphase Stainless Steel / MOP

The lug width of the Longines PrimaLuna L8.126.4.87.2 is 8mm. This specification is critical for selecting compatible straps: it is measured from the inner wall of the left lug to that of the right lug at the widest point. An incorrect measurement results in excessive lateral play or fitting impossibility. Only straps dedicated to this dimension guarantee proper contact without movement.

For this dress watch, we recommend alligator leather in deep brown-cognac or absolute black: the characteristic grain texture of this leather captures light subtly and ages with elegance, naturally complementing the enamelled dial and gilt hands. Alternatively, satin-finished calf leather offers impeccable minimalist aesthetics. Shell cordovan with vegetable tanning represents the choice for those seeking an evolving patina over time, transforming the strap into a uniquely personal signature.

Strap replacement requires careful extraction of the pins connecting the lugs to the case. Use a proper spring bar tool or consult a qualified professional. With the pin partially extracted, gently lift the old strap, then insert the new one by aligning the lugs to the holes. Reinsert the pin with uniform pressure until it locks. Avoid blunt impacts that damage the case: this operation demands precision more than force.

Yes, provided the lug width is exactly 8mm and the strap is designed for this width. Many straps labelled as "universal" or "adjustable" fail to meet construction tolerances and generate unacceptable lateral play on a dress watch of this calibre. Bespoke leather straps, customised to your specific case, offer maximum compatibility and aesthetic control, avoiding functional compromises.

The longevity of a leather strap depends on usage, care, and tanning quality. High-end alligator or calf leather, worn daily but moderately, lasts 4–6 years before replacement is needed. A vegetable-tanned shell cordovan strap may last 8–10 years whilst developing a captivating patina. Regular maintenance (cleaning, aeration, moisture protection) significantly extends service life. The 18-month guarantee offered by Casati Milano covers construction defects and stitching issues.