Strap for BC4 Der Meisterflieger Stainless Steel / Black / Bracelet

The Oris BC4 in the 01 649 7632 4164-Set MB version features a 22mm lug width. This dimension is the contemporary standard for high-end sports and aviator watches. The 22mm ensures harmonious proportions relative to the 42.70mm case diameter and guarantees compatibility with the extensive range of artisanal straps available in this size.

The ideal strap depends on intended use. For the aviatory and sports character of the BC4, we recommend vegetable-tanned leather in aged brown or cognac tones, which develops patina over time and enhances the functional design. Alternatively, grey-taupe calfskin offers formal-casual versatility. For extreme environments, a NATO in grey or navy tones, or dark grey FKM rubber, ensures practicality without aesthetic compromise. All available with 22mm lug width on milanostraps.it.

The Oris BC4 uses standard push-out spring bars for strap attachment to the lugs. Obtain a spring bar removal tool or fine screwdriver. Locate the small hole on the lug, insert the tool to depress the internal spring tension, then remove the spring bar from the case. Repeat on the opposite lug. Insert the new strap by aligning the holes with the lugs, then press the spring bar until it clicks into place. Ensure your strap is compatible with the 22mm lug width.

Yes, any strap with a 22mm lug width is compatible with the BC4. Milanostraps.it artisanal straps are specifically selected for this dimension and subject to quality control. Whether you choose Italian vegetable-tanned leather, shell cordovan, calfskin, technical NATO, or FKM rubber, all are immediately installable on your BC4 without modification.

Leather strap longevity depends on tanning method and usage patterns. Premium vegetable-tanned leather, such as that supplied by milanostraps.it, lasts 3–5 years with regular maintenance (annual conditioning, protection from standing water). Ageing does not constitute degradation but aesthetic evolution: leather develops patina and character. With intensive use and humid environments, rotating with alternative straps (NATO, rubber) extends the overall lifespan of your collection.