Nivada Grenchen · Super Antarctic

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

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
Reference35014M20
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 35014M20

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Super Antarctic 35014M20, seen from the bench

The Nivada Grenchen Super Antarctic 35014M20 is a Swiss sports watch from the 1960s designed for polar expeditions, featuring a 35 mm stainless steel case with clean, functional aesthetics. It houses the Landeron 21 manual calibre with 15 jewels, offering hours, minutes and seconds functions. The lug width is 18 mm. This model exemplifies essential watchmaking philosophy: reliable, simple construction without complications, suitable for extreme environments.

Frequently asked questions

What is the lug width of the Nivada Grenchen Super Antarctic 35014M20?

The lug width of the Super Antarctic 35014M20 is 18 millimetres. This measurement is critical when selecting an aftermarket strap: you must verify it by placing a digital calliper between the two lugs of the case, parallel to its axis, to ensure proper strap fitment.

Which strap is best suited to the Nivada Grenchen Super Antarctic 35014M20?

The Super Antarctic 35014M20, being a sports instrument designed for extreme conditions, pairs ideally with a cognac-toned alligator strap or a vegetable-tanned leather in dark burgundy. Both materials enhance the case's austere aesthetic whilst maintaining its functional vocation. A military nylon NATO strap offers the most authentic alternative for intensive use.

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

To change the strap, remove the watch from its current strap by extracting the spring bars from their recesses using a dedicated tool or watchmaker's knife. Insert the new strap into the same bars, ensuring both ends are firmly secured. The operation requires care to avoid scratching the case: professional execution is advisable.

Is an 18mm aftermarket strap compatible with the 35014M20?

Yes, any strap with precisely 18mm lug width is compatible with the Super Antarctic 35014M20, provided the ansa measurement is accurately verified. Atelier Casati Milano supplies bespoke artisanal straps, handcrafted to precise technical specifications, guaranteeing impeccable fit and constructive durability.

How long does a leather strap last on a watch like the 35014M20?

A quality artisanal leather strap, crafted from premium hides with vegetable tanning, typically lasts 3-5 years with moderate use (4-5 days per week). Longevity depends on: frequency of wear, climatic conditions (humidity accelerates deterioration), daily care (avoid prolonged moisture), and construction quality. FKM rubber straps endure longer in humid environments.

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.

Request an appointment →

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