Strap for Oris BC4 01 643 7617 4764

The Oris BC4 01 643 7617 4764 features a 22mm lug width, the standard construction measure for sports watches of this calibre. The width can be verified by measuring the distance between the two lateral terminals where the strap attaches to the watch case.

Selection depends on intended use. To maintain the avionic authenticity, a technical NATO in neutral colours (grey, military green) is ideal. For daily elegance, crocodile or calf leather with vegetable tanning enhances the proportions without compromising functionality. For pure practicality, perforated rubber offers adhesion and durability without compromise.

The 22mm lug is replaced by extracting the spring bars that connect the strap to the watch lugs. A dedicated tool (spring bar removal tool) is sufficient to laterally push the bars to release the previous strap and install a new one. This is a reversible operation that causes no damage to the case.

All straps constructed to the 22mm standard are compatible. Milano Straps offers a complete selection of artisanal leather, NATO and rubber straps, specifically measured for this lug width. Compatibility is guaranteed by international standardisation of lug width.

A premium quality leather strap (crocodile or calf with vegetable tanning) maintains optimal functionality for 3-5 years with regular daily use, acquiring natural patina and texture over time. Exact durability depends on intensity of use, climate and tanning quality. Rubber and synthetic NATO offer superior durability, up to 7-10 years.