Nivada Grenchen
Super Antarctic 35014M14— lug 18mm

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.

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.

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.

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.

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.