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Nivada Grenchen · Antarctic

Strap for Antarctic 35 Eggshell - 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 width

18mm
18 mm strapsAll Nivada Grenchen
Lug width18 mm
Case diameter35 mm
Reference35004M14
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

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Straps for the Antarctic 35004M14

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Antarctic 35004M14, seen from the bench

The Nivada Grenchen Antarctic 35004M14 is a legendary expedition chronograph from the 1950s, built to withstand extreme polar conditions. It features a 35mm stainless steel case with squared shoulders and a protected crown, paired with a manual-wind Landeron 21 caliber known for proven reliability. The spartan dial with phosphorescent indices ensures readability in low light. The 18mm lug width is the perfect proportion for this case, compatible with stainless steel lugs. This is a pure tool watch where form follows function.

Frequently asked questions

What is the lug width of the Nivada Grenchen Antarctic 35004M14?

The lug width of the Nivada Grenchen Antarctic 35004M14 is 18mm. This dimension represents the distance between the two pins that support the strap. It is essential to verify that any aftermarket strap is specifically sized for 18mm to ensure proper installation and secure retention of the spring bars without play or stress.

Which strap is most suitable for the Nivada Grenchen Antarctic 35004M14?

For the Nivada Grenchen Antarctic, we recommend a dark brown alligator strap or vegetable-tanned calf leather in cognac. These materials respect the vintage aesthetic and tool-watch character of the piece. For a more contemporary sporty approach, a grey or black NATO offers practical versatility. FKM rubber is ideal for humid environments and maintains the authentic functional heritage of the watch.

How do you change the strap on the Nivada Grenchen Antarctic 35004M14?

Strap replacement is achieved by removing the spring bars connecting the strap to the lugs. Using a specialised tool (strap lever or pin remover), gently press to release the elastic pin on one side, then slide the old strap outward. Repeat on the opposite side. Mount the new 18mm strap by aligning it with the lugs and inserting the pins one at a time until they click into place. Avoid forcing: the mechanism should engage smoothly.

Is an aftermarket third-party strap compatible with the 35004M14?

Yes, provided the lug width is exactly 18mm. Artisanal leather straps, NATO straps, and FKM rubber straps sized to 18mm are fully compatible and often offer superior construction quality to OEM replacements. Always verify specifications with the manufacturer, and if uncertain about dimensions, contact the supplier to confirm compatibility with your Nivada Antarctic lugs.

How long does a leather strap last on the Nivada Grenchen Antarctic?

A quality leather strap (alligator, vegetable-tanned calf) typically lasts 3–5 years with daily wear, provided it is properly maintained. Frequent exposure to humidity, perspiration, and detergents can reduce lifespan. A NATO or FKM rubber strap offers greater longevity (5–8 years) due to resistance to environmental factors. Patina and ageing are natural and desirable: they do not compromise functionality but add character to the piece.

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