Eterna · Heritage

Strap for Vaughan Big Date Silver

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter42 mm
Reference7630.41.61.1185
FamilyHeritage
MovementEterna caliber 3030 hours, minutes, seconds | big date
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 Heritage 7630.41.61.1185

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Heritage 7630.41.61.1185, seen from the bench

The Eterna Heritage 7630.41.61.1185 is a 42mm stainless steel watch featuring a large date display and hours, minutes, seconds functions. It is powered by the Eterna caliber 3030 automatic movement and has an 18mm lug width. The integrated bracelet design reflects Eterna's heritage since 1856, combining Swiss watchmaking precision with balanced aesthetics and mechanical reliability.

Frequently asked questions

What is the lug width of the Eterna Heritage 7630.41.61.1185?

The lug width of the 7630.41.61.1185 is 18mm. This measurement represents the internal space between the two vertical lugs that protrude from the case. It is essential not to confuse this with the external width of the lugs themselves. An 18mm strap inserts perfectly into these spaces, ensuring correct fit without mechanical play.

Which strap would you recommend for this Eterna model?

For the Eterna Heritage 7630.41.61.1185 we recommend a satin alligator strap or vegetable-tanned leather in brown or burgundy tones. These materials respect the dressage vocation of the model and develop a natural patina over time. For more versatile use, a robust canvas NATO offers practicality without compromising elegance. The choice depends on intended use: formal for alligator, daily wear for leather, sporty for NATO.

How do you change the strap on the Eterna Heritage 7630.41.61.1185?

To change the strap you need a springbar tool. Position the tool under each lug to create space, then compress the springbar against itself and extract it from the case. The old strap disengages. To fit the new one, align the holes with the springbars and reinsert each bar until you hear the locking click. If unsure, consult a professional watchmaker.

Is an aftermarket strap compatible with the 7630.41.61.1185?

Yes, any strap with 18mm lugs is compatible with the 7630.41.61.1185. Our artisanal straps are manufactured to DIN standards and fit perfectly. Mechanical compatibility is guaranteed; the choice remains purely aesthetic and functional. We recommend verifying the case diameter (42mm in this instance) to ensure balanced visual proportions with your chosen strap.

How long does a leather strap last on this watch?

A quality leather strap, worn daily, typically lasts 2-4 years before showing significant wear signs (deep creasing, stiffening, loss of elasticity). Duration varies based on tanning method, climate, humidity, and wearing frequency. Vegetable tanning tends to last longer than chrome tanning. An alligator or shell cordovan strap, being more robust, can reach 5-6 years. Regular maintenance with protective balms significantly extends lifespan.

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