Strap for PrimaLuna Automatic 30 Yellow Gold Diamond

The Longines PrimaLuna L8.113.7.78.6 features a lug width of 8mm. This measurement is the internal distance between the two attachment points on the case and represents a precise engineering specification. To verify it accurately, measure with a digital calliper the internal space between the case lugs where the strap inserts.

For the PrimaLuna L8.113.7.78.6 in yellow gold, we recommend alligator in black or dark brown for minimal contrast, or bordeaux shell cordovan which amplifies golden reflections. Vegetable-tanned calf in hazelnut brown offers a natural patina that develops authentically over time. For contemporary styling, a Tropic rubber in cement grey maintains elegance whilst preserving sportive character.

The PrimaLuna L8.113.7.78.6 employs a standard fixed-lug attachment system with securing screws. Obtain a precision spring bar tool or consult a qualified watchmaker. Gently loosen the lateral case screws, insert the new 8mm strap whilst maintaining perfect alignment, and tighten carefully. Excessive force may damage the gold threading.

Yes, any aftermarket strap with precisely 8mm lug width is compatible with the PrimaLuna L8.113.7.78.6. Ensure thickness does not exceed 3.5mm for smooth insertion and that finishing details do not interfere with case geometry. Milano Straps strapware is specifically calibrated to these specifications.

A quality leather strap—whether alligator or calf—typically lasts 3–5 years with moderate daily wear. Shell cordovan, being denser, readily achieves 5–7 years. Longevity depends on sun exposure, humidity levels, and frequency of wear. Casati Milano's 18-month warranty covers manufacturing defects; with proper maintenance (regular cleaning, protection from intense heat and moisture), the strap maintains structural integrity well beyond the first year.