Strap for Hydroconquest Chronograph L688

The Longines HydroConquest L3.696.4.13.6 features a 20 mm lug width, measured internally between the case lugs. This specification defines the space where the strap attaches. To verify compatibility, use a digital calliper or compare with a known 20 mm reference strap.

Recommended options include natural alligator with satin finish for formal-sports contexts, Italian calf leather with medium grain for natural patina development, or vulcanized rubber for technical diving configurations. Alligator emphasises the sophisticated sports character, calf develops authentic patina over time, and rubber complements underwater applications. A brushed steel bracelet with deployante clasp represents the classic sports alternative.

Strap replacement is performed using spring bars—small horizontal pins that support the strap in the case lugs. Using a dedicated spring bar removal tool or a fine-tipped pen, gently press the pin from one side to release the internal spring, then extract the old strap. Insert the new strap into the same space and release, allowing the spring to reposition automatically. This procedure requires care to avoid case scratches but is non-invasive and requires no case disassembly.

Yes, any strap with a 20 mm lug width is compatible. MilanoStraps offers artisanal leather straps in 20 mm ready for shipment, customisable in size, initials and thread colour. For bespoke tailored experience, the Casati Milano atelier creates custom straps with personal leather selection, WhatsApp consultations and 18-month warranty.

Durability depends on use and tanning method. An Italian calf strap with vegetable tanning lasts 18–24 months under daily wear, developing natural patina. Natural alligator offers 2–3 years lifespan thanks to denser structure and lower humidity sensitivity. Shell cordovan provides longevity up to 4–5 years with light maintenance. Vulcanised rubber matches alligator durability without patina formation. Factors including humidity exposure, bathing frequency and preventive maintenance significantly impact strap lifespan.