Strap for Hydroconquest Chronograph

The Longines HydroConquest L3.673.4.76.6 has a lug width of 20 millimetres. This dimension is fixed and corresponds to the distance between the lateral case lugs where the strap is attached. It is essential not to confuse this measurement with the total strap length, which varies according to wrist morphology and buckle type.

Strap choice depends on primary use. For everyday elegance, we recommend alligator in vegetable tannage (regular grain and natural ageing) or shell cordovan (superior density and luminous patina over time). For sportiness, gummed calf offers a balance between leather and moisture resistance. For aquatic purposes, a NATO in Cordura or FKM rubber guarantees practicality without compromise.

The strap is fixed via extractable spring bars positioned on the sides of the case (at 3 o'clock and 9 o'clock positions). Using a spring bar tool or small flat screwdriver, apply gentle lateral pressure to the spring bar to extract it from its seat. Next, slide the old strap outward and insert the new strap by aligning the first spring bar, then push the second spring bar into position until you feel the locking click.

Yes, absolutely. Any strap with a 20mm lug width is compatible with this model. Artisanal straps in vegetable-tanned leather, shell cordovan, or gummed calf do not compromise the functionality of the watch and often significantly improve the tactile and visual experience on the wrist compared to the original strap.

Durability depends on material, tannage, and use. A quality alligator or calf strap in vegetable tannage lasts an average of 3-5 years with daily wear, developing a natural patina that is part of its ageing process. Shell cordovan, being denser, can exceed 7-10 years. Exposure to intense moisture (chlorine, salt water) slightly shortens lifespan. Maintenance with specific hydrating creams significantly extends durability.