Longines
Master Collection L2.357.4.70.6— lug 18mm

The lug width of the Longines Master Collection L2.357.4.70.6 is precisely 18mm. This measurement represents the internal space between the lugs of the case where the strap is inserted. It is essential to measure with a digital calliper positioned between the internal lug seats, not to be confused with the case diameter (34mm). All compatible straps must respect this tolerance of ±0.2mm to ensure perfect fit and visual stability.

For the Master Collection L2.357.4.70.6, an alligator strap represents the optimal formal choice, thanks to the natural texture of the scales which enhances the minimalism of the dial. Alternatively, vegetable-tanned calf leather offers versatility and a patina that evolves over time. For sport-smart uses, options in 2-piece canvas or FKM rubber (18mm) are valid, maintaining the elegant proportions of the 18mm lug width. The choice depends on the intended use and personal aesthetic preferences.

Changing the strap on the Master Collection L2.357.4.70.6 requires the use of a specific tool called a spring bar tool. Position the tool in the appropriate groove on the lug, apply gentle and even pressure to extract the securing spring. Once the worn strap is removed, insert the new strap by aligning the holes with the lugs, then reinsert the spring until it clicks into place. It is advisable to avoid DIY if you lack experience: a professional watchmaker guarantees precision and prevents damage to the case.

Yes, there is a wide range of aftermarket straps compatible with the 18mm lug width of the Master Collection L2.357.4.70.6. milanostraps.it offers online a complete collection of 18mm straps in various materials: alligator, calf, shell cordovan, vulcanised rubber and NATO canvas. All straps are customisable in length, initials and stitching thread. For a bespoke experience, Casati Milano atelier manufactures custom straps with direct selection of leathers and 18-month guarantee.

The durability of a quality leather strap depends on frequency of wear, climate conditions and the type of tanning used. On average, a strap in calf or alligator with vegetable tanning maintains optimal functionality for 3-5 years of regular daily use. Frequent exposure to moisture, sweat and UV rays accelerates ageing. A shell cordovan strap, thanks to its superior physical characteristics, can last 5-7 years. To extend longevity, periodic maintenance with specific balms and rotation with other straps is recommended. Casati Milano guarantees 18 months on all custom-made straps.