Strap for North Flag Stainless Steel / Black / Bracelet

The Tudor North Flag 91210N-0001 is equipped with 20-millimetre lugs. This is a model-specific measurement, therefore straps must be calibrated precisely to 20 mm. A tolerance of ±0.2 mm is acceptable, but undersized or oversized straps will cause misalignment or binding on the lugs.

The best strap depends on intended use and aesthetic preference. For formal contexts, black smoked alligator or dark brown offers elegance without compromise. Vegetable-tanned leather represents the choice most coherent with the North Flag's technical philosophy, developing natural patina over time. High-quality FKM rubber is ideal for those prioritising functionality and durability. Avoid vivid colours: the North Flag requires chromatic restraint.

Strap replacement requires extraction of the lug pins. Use gentle pressure with a dedicated spring bar tool to free the pins from the inner lug shoulders. Proceed with caution to avoid scratching the case. Once pins are extracted, the previous strap releases and the new one can be installed. If inexperienced, entrust the operation to a qualified watchmaker to ensure absence of case or lug damage.

Yes, provided the strap is calibrated precisely to 20 millimetres lug width and constructed in certified quality leather or rubber. Aftermarket straps from reliable brands (e.g. genuine alligator or vegetable-tanned leather) are fully compatible and often offer colour variety and material superior to OEM straps. MilanoStraps offers a specific collection of 20mm straps with personalisation options. For advanced bespoke requirements, the Casati Milano atelier creates custom straps with direct leather selection.

A high-quality alligator strap or vegetable-tanned leather strap can last 8–12 years with daily wear and proper maintenance. Longevity depends on frequency of use, exposure to moisture, heat and UV rays. Vegetable-tanned leathers develop natural patina and improve aesthetically with time if properly cared for. High-quality vulcanised rubber guarantees 5–7 years of resistance. Casati Milano strap warranty is 18 months on materials and construction, with possibility of maintenance interventions.