Strap for Chronograph Automatic Open Home Time

The lug width of the Montblanc Nicolas Rieussec 107070 is 20 mm. This measurement is specific to the model and ensures correct proportions between the 43 mm case and strap. Measurement is taken by placing a ruler between the two lateral lugs (pins) or by consulting the original documentation.

For a chronograph of this technical complexity, we recommend alligator (cognac, tan, or black) for maximum refinement, or vegetable-tanned calf (burgundy, slate grey) for visual solidity. Alternatively, high-density rubber or superior nylon NATO for sports use. All materials must be 20 mm for perfect compatibility.

Position the watch on a soft mat or strap-changing tool. Locate the two pins protruding from the lateral lugs. Using the appropriate tool (spring bar or strap tool), gently press the pin inward to extract it, then slide off the old strap. Align the holes of the new strap to the pins and re-insert them until you hear a click.

Yes, provided it is certified for 20 mm lug width. Quality aftermarket straps (artisanal Italian leather, certified nylon NATO, Lorica rubber) are fully compatible with the Montblanc lugs on the 107070 and do not compromise warranty or functionality. Choose specialized suppliers for superior build quality and finishing.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with daily wear, depending on sun exposure, humidity, and maintenance. Protect it from saltwater and excessive sweat; apply leather conditioner every 12–18 months. With proper care, the leather develops patina rather than degrading.