Strap for KonTiki Four-Hands Black / Bracelet

The Eterna Adventure 1598.41.41.0217 features a 20mm lug width. This measurement is essential for aftermarket strap compatibility. Always verify the positioning of the lugs protruding from the case: the distance between them, measured in millimetres, must correspond exactly to 20mm to ensure secure fit without lateral play.

Strap selection depends on intended use environment. For enduring elegance: alligator with vegetable tanning, which ages in a controlled manner and develops natural patina. For humid and aquatic environments: vulcanised rubber, which resists moisture and maintains elasticity. For colour versatility and daily wear: NATO strap in cordura, offering colour variations and quick-change capability.

Remove the strap by extracting the lateral pins using a spring bar tool, a specialised small lever available from craftsmen and retailers. Position the watch with the case vertical, gently press the tool against one pin whilst lifting the used strap, extract the pin. Repeat on the other side. Insert the new strap aligning the holes with the pins and lever until seated. A task of minutes if executed with care.

The original Eterna strap for this reference is leather. All compatible aftermarket alternatives must feature 20mm lug width. Swiss or Italian alligator, vegetable-tanned calf, vulcanised rubber, cordura NATO: all these materials are available from specialised craftsmen and guarantee complete geometric compatibility and construction quality equivalent to or exceeding the original.

A quality leather strap (alligator, vegetable-tanned calf) used daily has a lifespan of 4–6 years before requiring definitive replacement. Longevity depends on bathing frequency, humid climates, direct sun exposure. A vulcanised rubber strap has a longer useful life, up to 10 years, thanks to the material's inherent resistance. Periodic maintenance (cleaning, conditioning) significantly extends the service arc.