Strap for Clous de Paris Power Reserve

The lug width of the Longines Heritage L2.703.4.56.3 is 22 millimetres. This measurement represents the distance between the inner shoulders of the lugs, which is the physical space where the strap inserts. Accurate measurement is essential to ensure compatibility with aftermarket straps.

For the Longines Heritage L2.703.4.56.3, we recommend alligator or vegetable-tanned calf leather straps. Alligator offers maximum elegance and longevity, whilst regenerated calf maintains a more accessible profile. Avoid NATO or rubber straps, which would undermine the classical character of the watch.

Strap replacement on the L2.703.4.56.3 is performed by removing the spring bars that secure the lugs to the case. Use a dedicated tool or a blunt-tipped instrument to push the bar inward, releasing one lug at a time. Insert the new strap vertically, then reposition the spring bars. We recommend having this operation performed by a professional if you are inexperienced.

Yes, any strap with a 22mm lug width is perfectly compatible with the L2.703.4.56.3. Aftermarket straps, provided they are certified and of artisanal quality (such as alligator or shell cordovan), offer chromatic versatility and customisation possibilities that factory straps cannot provide.

The lifespan of a leather strap depends on tanning quality and usage conditions. An alligator or shell cordovan strap with vegetable tanning, if properly maintained and protected from excessive moisture, can last 5–8 years. Regenerated calf tends to decline more rapidly, around 3–4 years. The natural patina that develops over time is a sign of positive ageing, not degradation.