Strap for Chronograph Automatic

The lug width of the Montblanc Nicolas Rieussec 106487 is 20 millimetres. This dimension is standardised by the manufacturer and is measured by calculating the internal distance between the two original lugs on the case. Verification with a digital calliper is the most accurate method to confirm compatibility with aftermarket straps.

Vegetable-tanned alligator represents the most recommended choice, as the natural texture of the reptilian leather enhances the black dial and develops a patina over time that creates aesthetic consonance with the steel case. Fine-grain or vertically-grained calf leather offers a more understated, minimalist alternative. For sporty or humid contexts, FKM rubber with integrated deployante is ideal.

Remove the original spring bars using a dedicated spring bar remover tool or a small flathead screwdriver. Insert the spring bar pin into the retention spring until the spring yields inward, creating space to extract the pin. Repeat for both sides. Install the new strap by aligning the pins with the original case lugs and pressing until the locking click engages. It is advisable to consult a watchmaker to avoid scratching the case.

Absolutely. Aftermarket 20mm straps from reputable manufacturers are fully compatible with the Nicolas Rieussec 106487. Milano Straps offers artisanal straps in alligator, calf leather and technical materials, crafted to the same construction standards as watchmaking brands. Consultation with Casati Milano allows you to select the material and finish ideal for your timepiece.

A high-quality leather strap (alligator or artisanal calf) typically lasts 2–4 years with daily wear, depending on climate, frequency of use and perspiration. Vegetable tanning, whilst less durable than chrome tanning, develops a fascinating patina that justifies planned replacement. Wear first manifests in micro-creasing and subsequently in edge thinning. Prolonged exposure to direct sunlight and humidity accelerates degradation.