Strap for Hydroconquest Quartz 39 Blue

The lug width of the Longines HydroConquest L3.640.4.96.6 is 22 millimetres. This measurement represents the internal distance between the two lugs (the metal attachments where the strap sits). Any compatible strap must respect this specification to ensure perfect positioning and prevent rubbing against the case.

For the Longines HydroConquest L3.640.4.96.6, we recommend three options depending on use: alligator (Nile crocodile) for elegance and evolving patina over time; vegetable-tanned calf leather for refinement and practicality in humid environments; natural rubber for intensive marine use and diving. The choice depends on intended usage and personal aesthetic preferences.

The strap is changed using a spring bar tool (a specific implement with two flat ends). Insert one end beneath the spring bar of the lug (the pin connecting the strap to the case) and apply pressure inward until it clicks, releasing the old strap. Once removed, install the new strap by reversing the procedure: align the spring bar and push until it clicks into place. This operation requires care to avoid scratching the case.

Yes, any strap with a 22-millimetre lug width is compatible with the Longines HydroConquest L3.640.4.96.6. Online you will find curated selections of artisanal 22mm straps in various materials (alligator, calf, rubber, canvas). It is important to verify the exact measurement and, if the strap has lugs, ensure they are finished with care to prevent case damage.

A quality leather strap (alligator or calf) typically lasts 3-5 years with daily wear, depending on frequency of water exposure and maintenance. Leather straps should be dried immediately after water contact and occasionally treated with leather-specific balm. Natural rubber has a longer lifespan (5-7 years) but tends to lose elasticity over time. A well-constructed strap with quality thread stitching will last longer than one with rough finishing.