Strap for PrimaLuna Quartz 30 Stainless Steel / Yellow Gold / Silver - Roman

The lug width of the Longines PrimaLuna L8.112.5.91.2 is 7mm. This measurement represents the internal distance between the two case lugs that hold the strap in place. It is essential to measure this precisely in millimetres before ordering a compatible strap, as even small deviations can cause friction or excessive play.

For a 30mm stainless steel case, alligator leather in vegetable tanning or vegetable-tanned calf leather represent the finest choices. Alligator offers a textured surface that dialogues elegantly with the satinned stainless steel finish, whilst calf leather in fine grain ensures aesthetic versatility and a patina that improves over time. For sportier contexts, natural rubber is a durable and comfortable solution.

Strap replacement requires a simple tool: a spring bar removal tool or dedicated lug pin extractor. Position the watch on a soft cushion, align the tool with the lug pin, apply gentle upward pressure until the internal spring releases, then withdraw the pin. Repeat for the second pin. Insert the pins into the new strap using the same reverse procedure. If you lack confidence, a qualified watchmaker can complete the operation in minutes.

Yes, any strap with a 7mm lug width is compatible. Bespoke artisanal straps from MilanoStraps, crafted to order or available in standard sizes, fit perfectly to the original PrimaLuna lugs. Always verify that the measurement is exact and that the strap width (typically 16–18mm for this case) is proportionate to case dimensions.

A high-quality leather strap, crafted using vegetable tanning methods, typically lasts 3–5 years with daily wear. Longevity depends on factors such as frequency of use, exposure to moisture and heat, and maintenance practices. With proper care—drying the strap after water exposure, avoiding excessive heat, and applying dedicated leather conditioners—durability can exceed 5 years. The Casati Milano atelier offers an 18-month warranty on all bespoke straps.