Strap for Oris BC4 01 735 7617 4164

The lug width is 22mm. This measurement is taken by positioning a digital calliper between the two lateral attachment pins of the case, excluding the lateral crown guards. 22mm is the standard for sports chronographs with 42.7mm cases, ensuring harmonious proportions on the wrist.

The choice depends on your intended use and aesthetic preference. For elegance, we recommend alligator in vegetable tanning, cognac hue. For historical authenticity, a military green NATO recalls the watch's aeronautical heritage. For daily sportiness, FKM rubber or grey calf leather offer practicality and contemporary style.

Insert a spring bar tool into the lateral case suspensions and gently press downward to compress the pins. Pull the strap outward with your other hand. Once free, snap the new 22mm strap into position, ensuring the pins engage symmetrically within the suspensions.

Any strap with a 22mm lug width is compatible. Always verify that the strap features proper lug pass-through (or a single pass) fitted to the case width (approximately 15mm) to prevent slippage. We recommend straps supplied with a quality spring bar tool for correct retention.

A quality artisanal alligator or calf leather strap lasts 3-5 years with moderate wear, depending on maintenance, climate, and frequency of use. The leather develops a natural patina over time. To extend its lifespan, apply vegetable-based protective waxes occasionally and repair deep cracks through a specialist leather craftsman.