Eterna
Adventure 1222.53.51.1723— lug 20mm

The lug width is 20mm. Measurement is taken by positioning a digital calliper between the internal ends of the two metal lugs on the case, vertically. This dimension is specific to the model and requires straps constructed to ±0.2mm tolerance to ensure precise fit without play or excessive resistance.

For the steel-rose gold combination, we recommend a dark brown alligator with natural drop that evolves toward anthracite tones, or cognac-coloured calf leather with vegetable tanning. For a maintenance-free sporty solution, black FKM rubber or NATO weave in 16 oz minimum retains visual clarity. For maximum elegance, dark burgundy shell cordovan amplifies the sophistication of the bi-chromatic case.

The Eterna Adventure features integrated lugs on its bracelet. To remove it, use a standard spring-bar tool (or small flat file) to gently push the lateral locking pin. Once the pin is withdrawn, the bracelet slides away. Insert the new 20mm strap by aligning it correctly, then reinsert the pin until you hear the locking click. Verify the strap does not rotate before wearing the watch.

Yes, any strap with lug width of 20mm (indicated as 20/20 by manufacturers) is compatible, provided the nominal width is exactly 20mm ±0.2mm. Eterna manufactures lugs to ISO standard tolerances. Ensure the strap does not present excessive stiffness in new leather: natural materials require 2–3 weeks of wear to soften completely and adhere to the case geometry.

A leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with ordinary maintenance: protection from direct water contact, avoiding extreme temperature swings, applying leather conditioner every 6 months. Vegetable tanning increases durability because it develops a protective patina over time. Rubber straps last 5–7 years. Replacement frequency depends on use: daily wear reduces the cycle by 1–2 years compared to occasional wear.