Nivada Grenchen · Antarctic

Strap for Antarctic 35 Eggshell - White Luminova / Stainless Steel / Tropic

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

Lug width18 mm
Case diameter35 mm
Reference35004M01
FamilyAntarctic
MovementLanderon caliber 21 Hours, Minutes, Seconds
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 Antarctic 35004M01

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Antarctic 35004M01, seen from the bench

The Nivada Grenchen Antarctic 35004M01 is a 35mm stainless steel watch embodying Swiss instrumental watchmaking heritage from the 1960s. It features a Landeron caliber 21 manual mechanical movement powering hours, minutes, and seconds. The 18mm lug width represents the optimal proportion for this compact case size, dimensioned to function with period-standard straps without generating structural stress on the case. The severe dial maintains legibility standards for distance visual control, reflecting exploration instrumentation protocols.

Frequently asked questions

What is the lug width of the Nivada Grenchen Antarctic 35004M01?

The lug width of the Nivada Grenchen Antarctic 35004M01 is 18 millimetres. This measurement represents the distance between the two spring bar attachment points and determines compatibility with any aftermarket strap. Measuring the lug width correctly is essential to avoid structural strain on the case.

What is the best strap for the Nivada Grenchen Antarctic 35004M01?

The ideal strap depends on your intended use. For a formal or elegant approach, we recommend an alligator with vegetable tanning in natural brown or burgundy tones. For robust daily wear, a tightly woven cotton NATO or FKM rubber strap offers durability and practicality. Shell cordovan represents a premium compromise, ensuring structural rigidity and a patina that improves over time.

How do I change the strap on the Nivada Grenchen Antarctic 35004M01?

Strap replacement involves removing the spring bars from their lateral slots in the case. Use a dedicated spring bar tool to avoid damage: insert the tool into the groove beneath the lug, gently push to release the spring, then remove the worn strap. Position the new 18mm strap by aligning the holes, then reinsert the spring bars until they click into place.

Can I use an aftermarket strap on this model?

Yes, any strap with an 18mm lug width is compatible with the Nivada Grenchen Antarctic 35004M01. Always verify that the spring bars are in perfect condition before mounting a new strap. Personalised aftermarket straps allow you to express your style whilst maintaining the watch's original technical specifications.

How long does a leather strap last on this watch?

The lifespan of a quality leather strap on a Nivada Grenchen Antarctic 35004M01 varies from 3 to 7 years depending on intensive use and environmental conditions. Vegetable-tanned alligator ages better than synthetic leathers, developing a pleasant patina. Direct sun exposure, sweat and humidity accelerate deterioration; periodic rotation with other straps significantly extends useful life.

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