Strap for Conquest Automatic 39

The Longines Conquest L3.656.4.56.6 features a lug width of 19 millimetres. This measurement is the standard reference for sports watches in this category and generation. You can therefore seek straps specifically sized at 19mm for optimal compatibility and precise fit.

The ideal strap depends on your intended use. For elegance, alligator in tobacco, grey, or black tones amplifies refinement without compromising the watch's sporting character. For longevity and natural patina development, vegetable-tanned calf leather excels. For maximum sportiness, a NATO in blue or forest green emphasises functional design. FKM rubber is the most practical choice for aquatic activities.

The strap is changed by removing the lug pins using a dedicated tool (spring bar remover). Once the pins are extracted from the case, the original strap separates naturally. Align the new strap's holes with the case lugs, then reinsert the pins gently. If you lack experience, consult a specialist watchmaker or contact Casati Milano atelier.

Yes, any strap with a 19mm lug width is compatible with your Conquest. Artisanal straps from MilanoStraps, crafted in leather, rubber, or fabric, fit your lugs perfectly. Always verify that the strap is specifically designated as 19mm and that its thickness aligns with the case geometry.

A quality leather strap (alligator, calf, shell cordovan) with vegetable tanning typically lasts 3 to 5 years in daily use, depending on wear, environmental humidity, and maintenance practices. Vegetable-tanned leathers age elegantly, developing a natural patina. Casati Milano atelier provides an 18-month warranty against manufacturing defects and anomalous wear.