Nodus
Obscura II— lug 20mm

The Nodus Obscura II features a 20mm lug width, measured perpendicularly across the lugs from centre to centre. This standard sits comfortably between the dressier 18mm and the more robust 22mm tool watch dimensions. For accurate measurement, use a vernier calliper positioned centrally across both lugs.

Optimal strap selection hinges upon the case material. For the DLC-treated bronze, an alligator in dark brown or a vegetable-tanned calf in pearl grey complements the aesthetic. For the 316L steel, an anthracite NATO, navy calf, or marine rubber amplify its sporting character. Those seeking a more formal presentation may choose black alligator with a deployante buckle.

The Nodus Obscura II employs standard 20mm spring bars. Position the watch on a soft surface, use a spring bar tool to gently compress the spring bar from the side, and slide it through the lug hole. Once released, the bar retracts readily. Install the new strap by aligning its holes with the spring bars and pressing firmly until both bars lock into position with an audible click.

Not necessarily. Whilst lug width is identical at 20mm, variations in attachment thickness, lug tip profile (flat versus curved), and the width of the case lugs themselves may cause fitment issues. A 20mm strap designed for one manufacturer may not seat perfectly on another. Always cross-reference technical specifications before purchase.

A premium alligator or vegetable-tanned calf strap, with proper maintenance, typically lasts 3–5 years under daily wear. Longevity depends on sun exposure, humidity, perspiration and frequency of use. Straps exposed to chlorinated water or sea salt degrade more rapidly. Regular cleaning with a dry cloth and periodic application of proprietary leather balms significantly extend service life.