Longines
Spirit L3.802.5.53.2— lug 21mm

The Longines Spirit L3.802.5.53.2 has a lug width of 21 mm. This measurement must be taken perpendicularly between the inner pins of both lugs. The manufacturing tolerance is ±0.5 mm, but the nominal value remains 21 mm. Accurate measurement is essential to ensure a precise fit of your new strap without lateral play.

For the L3.802.5.53.2, an alligator strap in cognac brown or black amplifies the elegance of the mixed stainless steel-ceramic-yellow gold case. Alternatively, vegetable-tanned calf leather in bordeaux or stone grey develops beautifully with time. For sportier contexts, an anthracite rubber strap or a natural fabric NATO strap preserve the model's versatility while maintaining its formal identity.

To change the strap, first remove the spring bars from inside the case using a strap removal tool, working gently to avoid scratching the case. Once the spring bars are freed, carefully separate the old strap. Insert the new strap between the lugs, ensuring it slides smoothly without forcing, then reinsert the spring bars. The 21 mm width ensures a precise fit without play.

Yes, any strap with a 21 mm lug width is compatible with the L3.802.5.53.2. Premium handcrafted straps made from alligator, shell cordovan, or calf leather offer superior aesthetic and construction compared to original straps. It is recommended to verify that the new strap has been custom-cut to your wrist size for optimal fit.

A natural leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with moderate daily wear. Durability depends on leather quality, tanning method, and frequency of use. Vegetable tanning, whilst more delicate than chrome tanning, develops a desirable patina and ages elegantly. To extend longevity, rotate your straps and protect leather from prolonged moisture and heat exposure.