Strap for PrimaLuna Automatic 30 Yellow Gold Diamond Leather Arabic

The lug width of the Longines PrimaLuna L8.113.7.16.2 is 8mm, measured between the internal shoulders of the spring bar attachment pins. This reduced dimension is a conscious design choice that responds to the 30mm case proportions and the overall design logic of the timepiece. Measuring correctly with a digital calliper between the pin shoulders ensures perfect compatibility with replacement straps.

Alligator represents the premier choice for the PrimaLuna: its natural texture and fine grain pair perfectly with the yellow gold case. For versatility, vegetable-tanned calf leather offers softness and develops personalised patina over time. Dark brown, cognac, or black alligator enhance the gold's warmth or maintain formal sobriety respectively. Synthetic rubber and NATO fabrics are contemporary alternatives for more sporting and seasonal use.

Strap replacement is performed by removing the attachment pins from the spring bar mechanism. Position the watch on a stable support and use a spring bar tool to compress the spring, then remove the pin from the case lugs. Insert the new strap ensuring the pins lock completely into the lugs. For precious watches such as this, we recommend having the operation performed at a specialist service centre to prevent scratching the yellow gold case.

All straps with 8mm lug width are compatible. Milanostraps offers a dedicated selection of 8mm straps in alligator, calf, shell cordovan and rubber, customisable in sizes, initials and stitching thread. Atelier Casati Milano also produces bespoke straps to order with choice of leather and personal updates. It is important to verify that the overall strap width does not exceed the case proportions to maintain aesthetic coherence.

A high-quality leather strap, such as those in alligator or calf, typically lasts 3-5 years with regular wear. Durability depends on frequency of use, exposure to moisture, and storage conditions. Vegetable-tanned leathers develop natural patina that tends to extend the aesthetic lifespan. Casati Milano offers an 18-month warranty on bespoke straps, whilst periodic maintenance (avoiding prolonged moisture, gentle cleaning with dry cloth) preserves the material over time.