Technical Archive

Eterna
Contemporary 2545.41.40.1715— lug 20mm

Eterna Contemporary 2545.41.40.1715: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Avant-Garde Quartz Big Date Black / Bracelet

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Eterna 2545.41.40.1715
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

2545.41.40.1715

Movement

Ronda caliber 6004.B Hours, Minutes, Small Seconds | Big Date

The Heritage

The Eterna Contemporary features the Ronda 6004.B quartz caliber with hours, minutes, small seconds, and large date indication. The model has the reference 2545.41.40.1715 and belongs to the Swiss brand's contemporary collection. The dial configuration follows a classic layout with an enlarged date window.

FAQ

What is the lug width of the Eterna Contemporary 2545.41.40.1715?

The lug width is 20 millimetres. This measurement is essential for selecting a compatible aftermarket strap. To verify the correct dimension, remove the spring bar from the lugs (the two small holes on the case sides) and check that it measures exactly 20mm. Any aftermarket strap must respect this specification to ensure perfect fit without play or friction.

What is the best strap for the Eterna Contemporary 2545.41.40.1715?

The optimal strap depends on intended use and personal preference. For formal and elegant daily contexts, we recommend an alligator strap with vegetable tanning: the textured grain dialogues perfectly with the brushed stainless steel case and develops natural patina over time. For durability and versatility, vegetable-tanned calf leather offers superior robustness with deep patina development. For aquatic environments and sports, an FKM rubber strap guarantees performance without compromise. Heavy cotton NATO straps are ideal for those who enjoy rapid aesthetic changes.

How do I change the strap on my Eterna Contemporary 2545.41.40.1715?

The process is straightforward and requires no special tools. Observe the two small holes (lugs) positioned on the case at the ansa level. Insert a thin, rounded object (such as a toothpick tip or dedicated tool) into one hole and gently push the spring bar upward until it extracts. Repeat on the other side. Once removed, the strap separates easily. Install the new strap by inserting the spring bar into the new strap's holes and the case lugs, ensuring it sits firmly in place.

Can I use an aftermarket strap compatible with my Eterna Contemporary?

Yes, absolutely. Any strap with a 20mm lug width is compatible. Milano Straps offers a curated selection of artisanal-quality aftermarket straps tested for the Eterna Contemporary 2545.41.40.1715: noble leather (alligator, calf), NATO straps, and technical rubber straps. All our straps are crafted from premium materials with certified workmanship. Always verify lug width before purchase to guarantee perfect compatibility.

What is the average lifespan of a leather strap for the Eterna Contemporary?

A high-quality artisanal leather strap (alligator or calf) with moderate daily use and proper maintenance has a lifespan of 3 to 5 years. Longevity depends on several factors: direct sunlight exposure, humidity, perspiration, and frequency of wear. Vegetable-tanned leather is more durable than chemically tanned varieties. To extend strap life, avoid prolonged saltwater immersion, clean regularly with a soft cloth, and occasionally apply leather balm. When the strap shows signs of tip deterioration or buckle wear, it is time to replace it.