Strap for Symphonette M Diamond / Arabic MOP

The lug width of the Longines Symphonette L2.305.0.83.0 is exactly 9mm. This is a non-standard measurement, less common than 16mm or 18mm sizes, requiring conscious sourcing of a compatible strap. To verify personally, measure the perpendicular distance between the inner edges of the lugs using a digital calliper.

The best strap depends on intended use and aesthetic preferences. For maximum elegance, we recommend black or dark brown alligator, which emphasises the refined proportions of the case. For versatility, a vegetable-tanned calf leather developing natural patina over time. For sporty contexts, a structured rubber or NATO strap in anthracite-grey maintains stylistic cohesion whilst ensuring practicality.

The strap is replaced by removing the spring bars connecting the strap to the case lugs. Use a dedicated tool (spring bar tool) to compress the pin and gently extract it. Insert the new strap, aligning the holes, reinsert the spring bar and verify it is securely fixed. If inexperienced, entrust the operation to a professional watchmaker.

Yes, but only straps specifically manufactured for the 9mm lug width. Milano Straps offers a dedicated collection for 9mm sizes, compatible with the Symphonette, featuring options in alligator, calf, shell cordovan and rubber. Always verify the strap is designated for 9mm before purchase.

Durability depends on material and usage. An alligator or shell cordovan strap, with proper maintenance, lasts 5-8 years. A vegetable-tanned calf lasts 3-5 years under intensive use. Milano Straps offers 18-month warranty on bespoke straps and recommends regular conditioning with leather-specific hydrating creams to maintain suppleness and prevent cracking.