Strap for La Grande Classique 34 Automatic Yellow

The lug width of the Longines La Grande Classique L4.708.2.12.2 is 18 millimetres. This measurement refers to the distance between the inner lugs of the case, where the strap is inserted. It is a characteristic dimension of elegantly proportioned models, less common in mainstream markets compared to 20 or 22 millimetres, requiring deliberate selection of compatible straps.

Recommended straps for this model include alligator (elegant dorsal texture), vegetable-tanned calf (natural aged patina), or shell cordovan (superior density and durability). Dark brown alligator remains the classic choice of excellence; grey talpa calf offers a more contemporary alternative. The 18mm lug width is compatible with specialised collections of artisanal straps.

The strap is changed by removing the spring bars positioned beneath the case lugs. Using a dedicated tool (spring bar remover), compress the internal spring and release the old strap, then insert the new one into the same seats. For the 18mm lug width of the L4.708.2.12.2, it is advisable to consult a professional watchmaker or the artisans at Casati Milano to prevent damage.

Compatible straps must have an 18-millimetre lug width. Specialised online collections of artisanal straps with this width are available, customisable in leather (alligator, calf, shell cordovan), colour, stitching and buckle. Compatibility is guaranteed if the lug width matches exactly 18mm; length and thickness may vary according to wrist constriction and strap design.

The durability of a leather strap depends on material and usage. Vegetable-tanned calf lasts approximately 3–5 years of daily wear, developing natural patina. Alligator and shell cordovan offer superior longevity, up to 7–10 years or longer. Accelerated ageing from perspiration, humidity and sun exposure shortens lifespan, whilst storage in a dry environment extends it. Artisanal straps from Casati Milano include an 18-month warranty against manufacturing defects.