Strap for La Grande Classique Quartz 29 Stainless Steel

The lug width is 16mm. This measurement is specific to the L4.512.4.71.2 model and represents the distance between the two lugs on the case where the strap attaches. To measure accurately, use a digital calliper or ruler positioned on the inside of the case between the spring bar holes.

Alligator leather with vegetable tanning represents the finest choice: its fine grain and natural patina complement the minimalist elegance of the model. Alternatively, vegetable-tanned calf leather offers durability and a texture that softens over time. For everyday practicality, an FKM or silicone rubber strap maintains the slim profile without compromising water resistance.

The process is straightforward: use a spring bar tool to gently push the internal spring and remove the lug from one side of the case. Insert the new strap by aligning the holes with the suspension lugs, then push until you hear a security click. If unsure, Casati Milano offers professional fitting services.

Yes, provided the strap has lugs compatible with the 16mm measurement. Always verify with the seller that the strap is designed for this specific dimension, as not all universal straps meet the millimetre tolerances required by Longines. The experts at Casati Milano can verify compatibility before purchase.

Durability depends on the leather type and usage: vegetable-tanned alligator can last 3-5 years with daily wear, whilst robust calf leather reaches 5-7 years. Factors such as humidity, perspiration and frequency of wear affect longevity. Casati Milano guarantees all its straps for 18 months and offers maintenance and replacement services.