Strap for KonTiki Quartz Chronograph Silver / Bracelet

The lug width of the Eterna Adventure 1250.41.11.0217 is 20 millimetres. It is measured from the inner base of one lug to the other, with the watch positioned flat on a rigid surface. This measure is the standard for straps compatible with the model and allows a vast choice of materials and thicknesses without the need for adapters.

The choice depends on your usage. For an elegant-sporty approach, we recommend alligator or shell cordovan with vegetable tanning, which develop characteristic patina over time. For maximum tactical versatility, woven NATO straps in grey-blue tones maintain the sporty soul. For intense water activities, FKM rubber (fluoroelastomer) offers perfect grip when wet and thermal resistance. All materials are available in 20mm lug width.

Strap change is a manual procedure requiring no special tools if the case features spring bars (reversible spring pins). Insert a lug bar (thin, flat tool) under the spring bar, press downward until the click, extract the old strap by sliding outward. Insert the new strap by sliding the lugs into the lateral openings until the retention click. For professional installation, Casati Milano offers strap-change service by appointment at our tailoring atelier in Milan.

Yes, absolutely. All artisanal straps with 20mm lug width are compatible with the 1250.41.11.0217. Before ordering, verify that the strap is specifically sized for 20mm lug width. Milano Straps offers a dedicated collection of 20mm straps in alligator, calf leather, NATO, and rubber—all mountable without modifications to your Eterna case.

A leather strap (alligator, calf, shell cordovan) with vegetable tanning typically lasts 3–5 years of daily wear, accounting for natural buckle wear and aesthetic scratching. Lifespan increases if rotated regularly. The leather progressively thins at flex points (lug passages). Woven NATO and FKM rubber straps have longer lifespan (5–7 years) since the materials maintain constant elasticity.