Strap for BelleArti 24.6 Modern Diamond

The lug width of the Longines Heritage L2.504.0.97.0 is 15 millimetres. This measurement should be taken from the innermost point of one lug to the innermost point of the opposite lug, excluding the case body. Incorrect measurement risks acquiring incompatible straps, as many aftermarket straps are only available in standard widths such as 16 or 18 millimetres and will not fit the spring bar mechanism correctly.

The optimal material depends on intended use and aesthetic preference. Belly-cut <a href="/pages/termine-glossario/alligatore">alligator</a> offers a refined, naturally-textured appearance. European calf treated with <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a> develops an evolved patina over time, whilst <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> from horse leather guarantees a compact grain and superior tactile density. For versatility, a parachute-nylon NATO allows rapid stylistic changes. For humid environments, a structured rubber strap with a titanium <a href="/pages/termine-glossario/deployante">deployante</a> provides the most practical solution.

Remove the strap using a spring bar tool or hammer and spare spring bar. Position the watch on a soft support, locate the small spring clip inside each lug, press gently inward whilst extracting the horizontal pin. Once the previous strap is removed, align the new strap with the lugs and reintroduce the pin, ensuring the spring clip engages correctly on both sides. If unfamiliar with the procedure, consult a qualified watchmaker to avoid damage to the case or lugs.

Compatibility depends on lug width. The L2.504.0.97.0 model specifically requires 15-millimetre lugs. Many aftermarket straps are available only in standard sizes such as 16, 18 or 20 millimetres, requiring targeted sourcing. Milano Straps offers a dedicated collection of <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-15mm">15mm straps</a> compatible with this model, available both pre-made and bespoke through the Casati Milano atelier.

Durability depends on leather quality, frequency of use and environmental conditions. A strap in premium <a href="/pages/termine-glossario/alligatore">alligator</a> or <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> can last 3–5 years with regular maintenance. European calf treated with <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a> typically lasts 2–4 years. Prolonged exposure to humidity, direct sunlight or heat accelerates ageing. Proper care—occasional cleaning, protection from humid environments, drying after water contact—significantly extends strap lifespan. Straps crafted by Casati Milano include an 18-month warranty.