Technical Archive

Nivada Grenchen
Super Antarctic 32040A17— lug 20mm

Nivada Grenchen Super Antarctic 32040A17: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Super Antarctic 3.6.9. Brown - White Luminous / Stainless Steel / Black

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Nivada Grenchen 32040A17
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

32040A17

Movement

Soprod caliber P024 ND Hours, Minutes, Seconds

The Heritage

The Nivada Grenchen Super Antarctic 3.6.9 is a Swiss instrument watch from the 1960s designed for explorers and divers. The stainless steel case measures 38mm in diameter and houses the mechanical Soprod P024 ND caliber with manual winding and 17 jewels. The 20mm lug width is proportional to the case design, requiring a strap width of 19.8–19.9mm for proper fit. Water resistance reaches 100 meters, suitable for swimming and recreational diving of that era.

FAQ

What is the lug width of the Nivada Grenchen Super Antarctic 32040A17?

The Nivada Grenchen Super Antarctic 32040A17 features a lug width of 20mm. This measurement represents the internal distance between the two lug shoulders where the strap attaches. It is essential to verify that any strap you purchase is compatible with this exact width, as the Super Antarctic does not accommodate 18mm or 22mm straps without compromising stability and aesthetics.

Which strap is best suited for the Super Antarctic 32040A17?

The optimal strap choice depends on intended use and personal preference. For an authentic vintage aesthetic aligned with the watch's exploratory heritage, a natural brown alligator or vegetable-tanned calf leather emphasises the instrument-grade character of the piece. For active or aquatic use, FKM (Viton) rubber in satin black offers maximum durability and water resistance. NATO straps in charcoal grey or navy blue historically reference military and polar expedition issue straps, maintaining coherence with the watch's genesis.

How do I change the strap on the Super Antarctic 32040A17?

Strap removal is accomplished via spring bars (spring-loaded bars) housed within the lugs. Using a spring bar tool or dedicated implement, gently compress the spring bar inward until the end withdraws from its seat. Remove the old strap, insert the new one (confirming the 20mm width) and release the spring bar, which will re-engage in its corresponding slot. This procedure requires care but is straightforward—most horologists complete the operation in under two minutes.

Is an aftermarket strap compatible with the Nivada Grenchen Super Antarctic 32040A17?

Yes, any strap with a 20mm lug width is compatible with the Super Antarctic 32040A17, provided the spring bars are in sound condition and the strap's terminal thickness does not impede smooth insertion into the lug. Bespoke, artisan-crafted straps manufactured to precise tolerances guarantee superior fit stability and longevity compared to generic industrial straps. Always verify dimensions before purchase.

How long will a leather strap last on the Super Antarctic?

Strap longevity depends upon construction quality, usage intensity and climate exposure. A naturally finished alligator strap with vegetable tanning, properly maintained, may serve 5–8 years of daily wear before displaying significant wear at stitching or flexion points. Prolonged exposure to salt water, perspiration and UV radiation accelerates degradation. A NATO strap in high-density polyester typically lasts 10–15 years. FKM rubber may exceed 15 years if not subjected to extreme temperature fluctuations. Investing in an artisan strap with meticulous finishing ensures longevity and distinguished patina development.