Strap for Symphonette XL Arabic MOP

The lug width of the Longines Symphonette L2.307.4.83.0 is 13mm. This measurement refers to the internal distance between the lugs on the watch case. To verify this, place a ruler on the top shoulder of the case—the measurement should be exactly 13mm. This is a non-standard size, so strap selection must be precise to ensure proper fitment and to prevent premature wear on the spring bar mechanisms.

Vegetable-tanned alligator is the ideal choice for this model, thanks to its fine grain and light weight that preserve the elegant proportions of the 24.9mm case. Full-grain box calf is an excellent alternative for autumn and winter wear, whilst cotton-silk NATO straps are perfect for summer use. For technical and sports applications, black FKM rubber offers superior water resistance and durability.

The strap is changed via the spring bars located on either side of the case within the 13mm lugs. Use a dedicated spring bar removal tool to compress the spring and extract the old strap. Align the new strap holes with the spring bars and release the spring to secure the strap in place. Verify that the strap is not twisted and is fully engaged before wearing the watch. If unfamiliar with this procedure, consult a qualified watchmaker to avoid damaging the lug holes.

Yes, aftermarket straps may be used provided the lug width is exactly 13mm. Milanostraps offers a specialised collection of 13mm straps crafted from premium materials including alligator, calf, shell cordovan and technical rubber—all compatible with the Symphonette. Professional artisanal straps provide superior quality compared to mass-produced alternatives, extending the functional lifespan of the strap and preserving the watch's aesthetic integrity.

A strap treated with vegetable tanning has an average lifespan of 3–4 years under moderate use (5–6 days weekly). Shell cordovan and alligator resist longer, lasting 5–6 years, due to fibre density. Longevity depends on climate, body moisture and frequency of water exposure. Artisanal craftsmanship such as Casati Milano's includes an 18-month warranty and permits repairs and resizing that further extend strap lifespan.