Eterna · Contemporary

Strap for Madison Eight-Days Grey

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter39 mm
Reference7720.41.53.1231
FamilyContemporary
MovementEterna caliber 3510 hours, minutes, seconds | big date
Year2011
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Contemporary 7720.41.53.1231

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Contemporary 7720.41.53.1231, seen from the bench

The Eterna Contemporary reference 7720.41.53.1231 is powered by the Eterna 3510 caliber with hour, minute, second and big date indication. The movement ensures the display of time functions through a well-readable big date system. Technical specifications regarding case dimensions and materials used are not available for this model.

Frequently asked questions

What is the lug width of the Eterna Contemporary 7720.41.53.1231?

The lug width of the Contemporary 7720.41.53.1231 is 20mm. This dimension is measured between the inner shoulders of the quick pin and is critical for compatibility with aftermarket straps. Always select straps explicitly labelled for 20mm lug width.

What is the best strap to pair with the Eterna Contemporary 7720.41.53.1231?

Vegetable-tanned alligator represents the supreme choice: its regular texture and natural patina create aesthetic harmony with the brushed-finished steel case. Napa calfskin offers softness and an accessible patina development. For robust daily wear, FKM rubber ensures durability and minimal maintenance.

How do I change the strap on the Contemporary 7720.41.53.1231?

The Contemporary employs classical straight pins. Obtain a standard watch tool and gently push the pin from one side to the other. Rest the watch on a soft surface to avoid scratches. The new strap must feature a 20mm lug width to fit correctly into the case shoulders.

Is an aftermarket strap compatible with the Eterna Contemporary 7720.41.53.1231?

Yes, any strap with a 20mm lug width is compatible. Always verify the strap is labelled for this specific dimension and that the thickness does not exceed 3.5mm at the lug, to avoid friction with the case during pin passage.

How long does a leather strap last on a watch like the Contemporary?

A high-quality artisanal alligator or calfskin strap lasts between 3 and 5 years of daily wear, depending on frequency of use and care. Prolonged exposure to sunlight and humidity accelerates ageing. FKM rubber lasts 2–3 years before showing significant material stress.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only