Strap for Prestige Gold 19.5 Quartz White Gold

The lug width (or strap width) of the Longines L6.107.6.77.6 is 20mm. This dimension is measured internally, from one lug wall to the opposite wall, perpendicular to the case. A 20mm strap ensures smooth insertion and uniform pressure on the lugs without creating abnormal tension or binding.

The optimal pairing for the Longines L6.107.6.77.6 is a semi-gloss alligator strap, preferably in deep black or medium cognac. The regular texture of alligator echoes the dial's aesthetic purity, whilst the luminous reflection of leather harmonises naturally with white gold. Alternatively, a vegetable-tanned calf strap in dark brown offers authenticity and develops natural patina over time.

To change the strap on your Longines L6.107.6.77.6, use a spring bar tool to gently push the spring bar downward, releasing the current strap from one lug at a time. Insert the new 20mm strap by threading it through one lug first, aligning the spring bar, then securing it to the opposite lug with a controlled, firm movement. This operation requires precision; never force components to avoid damaging the spring bars.

Yes, quality aftermarket straps constructed for 20mm lug width are fully compatible with the Longines L6.107.6.77.6. Working with specialised artisans who understand Longines lug engineering ensures flawless fit. Custom straps allow variation in material, colour, stitching, and finishing according to personal preference without compromising the watch's mechanics.

Strap lifespan depends on material and usage patterns: vegetable-tanned leathers maintain structural integrity for 3–5 years of regular wear, developing desired patina; alligator and premium hides reach 5–7 years due to denser fibres; aniline-dyed leathers are more delicate (2–3 years). Humidity, solar exposure, wearing frequency, and fibre quality significantly influence longevity.