Strap for Antarctic 35 Black - White Luminova / Stainless Steel / Black Racing

The lug width of the Nivada Grenchen Antarctic 35002M40 is 18mm. This measurement is specific to this model and non-standard within the Nivada range. It is measured from the inner edge of one lug to the other, using a digital calliper or ruler. It is essential to verify this measurement before purchasing an aftermarket strap.

For the 35002M40, we recommend a high-grade alligator strap with vegetable tanning, which restores the formal elegance of the instrument, or vegetable-tanned calf leather for a more rustic approach. If you seek contemporary practicality, a mercerised cotton NATO or fluoroelastomeric rubber strap offers zero maintenance and wear resistance. All must feature an 18mm lug width.

Strap replacement requires simple tools: a spring bar tool (lever for the anchor springs) and a small file or plastic utensil to avoid scratching. Insert the flat lever under the anchor spring on one side of the case and push towards the centre until the spring compresses, then remove the old strap. Repeat on the other side. The new strap, with 18mm lug width, should be inserted by first aligning one hole with the spring, then pushing the lever to compress the spring on the other side until perfect alignment is achieved.

Yes, there are artisanal aftermarket straps produced specifically for the 18mm lug width. It is essential to verify that the strap is certified for this exact width: 19mm or 17mm straps will not seat correctly on the case. Specialist vintage strap suppliers offer solutions in vegetable leather, alligator and technical materials, all compatible with the original lugs.

Durability depends on intensity of use and leather quality. A first-grade vegetable-tanned leather strap, worn daily, typically lasts 3–5 years before replacement. Vegetable leathers develop a patina that increases their character over time. High-grade alligator lasts longer, even 7–10 years. Fluoroelastomeric rubber is virtually immortal but may lose elasticity after 8–10 years of sun exposure. Regular maintenance (quarterly conditioning for leathers) significantly extends strap life.