Nivada Grenchen · Super Antarctic

Strap for Super Antarctic 35 Black - White Luminova / Stainless Steel / Brown - White

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
Reference35014M14
FamilySuper Antarctic
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 Super Antarctic 35014M14

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Super Antarctic 35014M14, seen from the bench

The Nivada Grenchen Super Antarctic 35 is a postwar polar chronograph tool watch born in the 1950s for Antarctic expeditions. It features a 35mm stainless steel case housing a Landeron caliber 21 movement with hours, minutes, and seconds on a clean dial. The distinctive 18mm lug width is characteristic of this series, requiring specific straps and ensuring harmonic proportions between case and bracelet. A rare piece for collectors who appreciate authentic watchmaking heritage.

Frequently asked questions

What is the exact lug width of the Nivada Grenchen Super Antarctic 35014M14?

The lug width of the Super Antarctic 35014M14 is 18 millimetres. This measurement must be taken between the inside edges of the two spring bar attachments on the case. Verifying this measurement with precision before purchasing aftermarket straps is essential to ensure correct positioning and secure closure.

Which strap is best suited for the Nivada Grenchen Super Antarctic?

For the Super Antarctic, vegetable-tanned leather is the choice that best honours the model's historical heritage. Tuscan leather offers robustness, density, and develops a noble patina over time. For more demanding use, FKM rubber guarantees waterproofness and thermal resistance. NATO straps work well in neutral tones such as military grey or dark blue.

How do you change the strap on a watch with an 18mm lug width?

To change the strap on a watch with 18 millimetre lugs, use a spring bar removal tool or a small, non-sharp flat blade. Compress the small metal arch (spring bar) at the end of the lug towards the inside of the case, then gently slide the existing strap off the pin. Repeat with the second lug. With the new strap, insert the pin into the corresponding hole and release the spring bar with a smooth motion.

Are aftermarket straps compatible with the Nivada Grenchen Super Antarctic 35014M14?

Yes, aftermarket straps are fully compatible provided they feature the correct 18 millimetre lug width. Milano Straps offers a selection of 18mm straps in vegetable-tanned leather, rubber and fabric, all suitable for your Super Antarctic. Before purchase, always verify that the strap width matches the case's 18 millimetres exactly.

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

The lifespan of a vegetable-tanned leather strap depends on frequency of use, climate conditions and care. With moderate use, a high-quality leather strap can last 3 to 5 years. Constant exposure to moisture, perspiration and sunlight reduces longevity. A well-maintained Tuscan leather strap—regularly dried and stored in dry environments—ages beautifully and remains functional well beyond 5 years. The patina developed over time is a prized characteristic, not a fault.

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