Strap for Presence 34.5 Automatic Stainless Steel

The lug width of the Longines Presence L4.821.4.18.6 is 18mm. This measurement is taken from the right lateral lug to the left lateral lug of the case, at the point where the strap is fitted. It is a less common dimension compared to the standard 20mm, so selecting a compatible strap requires careful attention.

For the Presence L4.821.4.18.6, we recommend alligator leather in dark tones (black, brown, burgundy) to maintain the formal elegance of the model. Alternatively, smooth or grain calf leather offers daily comfort, whilst shell cordovan represents the choice for those seeking patina and history. A rubber or fabric strap is appropriate only if you wish to create a deliberate stylistic contrast between the formality of the case and the casualness of the strap.

To change the strap, use a spring bar tool or consult a watchmaker. Position the tool under the elastic spring that holds the strap; press gently upward until the spring retracts, then remove the old strap. Insert the new strap by aligning the lateral holes with the lugs of the case, ensuring the spring repositions correctly. Avoid forcing to prevent damage to the case.

Yes. Numerous aftermarket straps with 18mm lug width are available from specialist manufacturers. MilanoStraps offers a dedicated selection of 18mm straps customisable in leather, size, and finishes. The important thing is to always verify that the lug width is exactly 18mm and that the strap is designed for watches of similar case diameter (34-36mm) to maintain harmonious proportions.

The lifespan of a leather strap depends on the type of tanning, usage, and maintenance. A quality alligator or calf strap, with consistent care (dry it after water exposure, keep it out of direct sunlight for extended periods), lasts 3 to 5 years. Shell cordovan, thanks to its dense fibrous structure, can last 7-10 years or more, developing a fascinating patina. Regular maintenance significantly extends the life of the strap.