Strap for Evidenza 19.6 Diamond

The Longines Evidenza L2.175.0.71.5 features a lug width of 10mm. This measurement is specific to the tonneau model and represents the distance between the strap attachment lugs. To verify compatibility with any aftermarket strap, measure the space between the lugs on your case using a ruler: it must be exactly 10mm. This dimension is relatively uncommon in the watch market, so the selection of compatible third-party straps is more curated than with standard 16mm or 18mm lug widths.

Given the Art Deco heritage of the Longines Evidenza, alligator leather represents the most stylistically coherent choice: its fine, regular grain amplifies the tonneau case's sculptural geometry. For elegant alternatives, shell cordovan offers evolving patina over time, whilst vegetable-tanned calf proposes tactile versatility. Silk synthetic NATO straps or technical rubber options work well for a contemporary approach. Avoid excessively rigid or thick straps, as the tonneau case requires constructive softness to follow the natural curvature of the wrist.

Strap replacement requires minimal tools: a springbar tool (small lever extractor) and care. Position the watch with the strap facing upward, insert the springbar tool's tip into the lug hole, apply gentle downward pressure to compress the internal spring, then extract the lug. Once freed, the strap detaches. The reverse procedure reinstalls it: align the new strap to the lugs, insert the lug from one side (the spring compresses naturally), and verify correct locking with a gentle tug. Given the tonneau case's delicacy, perform this operation on a soft, well-lit surface.

Any artisanal strap with a 10mm lug width is mechanically compatible. However, aesthetic compatibility requires consideration: the tonneau case has a subtly curved profile, so rigid or excessively thick straps don't naturally follow the geometry. We recommend straps of 3–4mm thickness, constructed from soft, slightly elastic leathers (alligator, shell cordovan, vegetable-tanned calf). Bespoke artisanal straps allow customisation of length and proportions to your specific wrist requirements.

Lifespan depends on leather type, frequency of use, and environmental conditions. High-quality alligator lasts 3–5 years with daily wear; shell cordovan 4–6 years (benefits from natural patina that increases durability); vegetable-tanned calf 2–3 years before replacement. Constant exposure to moisture, direct sunlight, and perspiration accelerates wear. Rotating between multiple straps (alternating every 2–3 days) significantly extends life, allowing the material to breathe. Artisanal workshops like Casati Milano offer 18-month warranties on bespoke straps, covering construction defects and ensuring superior longevity compared to industrial products.