Strap for PrimaLuna 30.5 Quartz Moonphase Stainless Steel / Blue - Roman / Bracelet

The lug width (ansa measurement) of the Longines PrimaLuna L8.115.4.91.6 is 8mm. This is a standard dimension for high-end ladies' wristwatches. To verify: measure with a ruler the distance between the two watch lugs, from the inner edge of one to the other. A strap manufactured specifically for this width ensures millimetre-perfect fit and stability on the wrist.

The choice depends on usage and personal aesthetic preference. For formal occasions and elegant daily wear, alligator or vegetable-tanned calf leather are ideal. Shell cordovan offers extraordinary durability and ages beautifully. For sports or humid environments, vulcanised rubber represents the most versatile choice. All materials must be manufactured with 8mm lug width compatibility.

The PrimaLuna features fixed lugs (non-removable lugs). To change the strap, you must use a specialised tool to extract the spring bars from the lug holes. It is strongly recommended to entrust this operation to a qualified watchmaker to avoid damage to the case. Alternatively, Casati Milano offers strap-change service with work guarantee.

Yes, absolutely, and it is highly recommended. A superior quality artisanal strap enhances both the aesthetics and daily comfort of your watch. The critical requirement is selecting a strap specifically manufactured for 8mm lug width. Milano Straps offers compatible straps in various materials (alligator, calf, shell cordovan, rubber) with customisation of length, initials and stitching colour.

Longevity depends on material and usage pattern. A quality vegetable-tanned calf strap typically lasts 3-5 years with daily wear. Shell cordovan can last 5-7 years owing to its compact structure and abrasion resistance. Alligator offers medium durability (3-4 years) relative to leather fineness. Vulcanised rubber lasts 4-6 years. Periodic maintenance—cleaning, drying, conditioning—significantly extends strap lifespan.