Strap for PrimaLuna Quartz 30 Stainless Steel / Yellow Gold / White / Bracelet

The lug width of the Longines PrimaLuna L8.112.5.90.6 is 7mm. This measurement represents the internal distance between the two lugs (horns) that attach the strap to the case. To verify compatibility with an aftermarket strap, measure this distance using a digital calliper or a transparent ruler positioned perpendicularly to the lugs.

There is no universal answer—the choice depends on your intended use. For formal elegance, alligator offers natural grain and sophistication. For appreciating patina development, vegetable-tanned calf leather develops character over time. Shell cordovan provides exceptional durability for a long-term investment. NATO straps deliver versatility and practicality. Quality rubber is the pure technical solution for absolute grip and resilience.

Changing the strap on the PrimaLuna requires a specialised tool called a spring bar tool. Position the thin end of the tool in the small hole on one lug to compress the internal spring, then extract the bar. Repeat for the opposite side. Insert the new strap by aligning its holes with the lugs and reintroduce the bars until they lock with an audible click. If you prefer not to work directly on the watch, consult a professional watchmaker.

Yes, provided the strap is sized for a 7mm lug width. Quality aftermarket straps represent an ideal solution for increasing the versatility of your timepiece without further investment in the watch itself. Ensure that the strap width is consistent with the proportions of the 30mm case: straps that are too wide will appear visually disproportionate, whilst those precisely calibrated at 7mm maintain the model's aesthetic harmony.

The durability of a leather strap depends on material quality and daily wear. A superior quality alligator or calf strap typically lasts between 3 and 5 years with regular use, developing a compelling patina. Shell cordovan offers exceptional durability, often exceeding 7–8 years. Vegetable-tanned leather, whilst visibly ageing, maintains structural integrity for longer periods. Humidity, perspiration, and direct sunlight accelerate degradation. To extend longevity, store the strap away from direct light and allow the leather to dry completely after use in humid environments.