Strap for KonTiki Four-Hands Full Black / Strap

The Eterna Adventure 1598.43.41.1306 features a lug width of 20mm. This is the internal distance between the two spring bar attachment points on the case lugs. This standard 20mm measurement ensures complete compatibility with all 20mm aftermarket leather straps and NATO options available in our collection.

For this model, we recommend vegetable-tanned leather straps (calf skin, alligator) in dark hues such as chocolate brown or hazelnut. The robustness of the stainless steel 42mm case naturally complements the organic patina development of vegetable-tanned leather. Alternatively, heavyweight cotton NATO straps or black vulcanised rubber are mechanically and aesthetically coherent choices for sporting or challenging climatic conditions.

The strap is replaced by removing the two spring bars located at the case terminals. A specialised spring bar tool with forked ends is required to compress the lateral pins and release the strap from its seatings. Casati Milano, by appointment, can execute this operation swiftly and with precision, ensuring case integrity throughout the process.

Yes, any strap with a 20mm lug width is mechanically compatible with the 1598.43.41.1306. Our artisanal straps are crafted to respect this international standard. The primary considerations are aesthetic and functional: selecting a material and colour that genuinely dialogue with the case's sporty character and that withstand your anticipated usage patterns.

Leather strap durability depends on frequency of wear, moisture exposure, and construction quality. A well-made strap with vegetable tanning typically withstands 3–5 years of moderate daily use. Given the Eterna Adventure's robust nature, the strap tends to show wear with regularity: keeping a second strap on hand ensures aesthetic continuity and protects your initial investment.