Strap for Oris BC4 01 674 7633 4764

The lug width of the Oris BC4 01 674 7633 4764 is 24 mm. This dimension is measured orthogonally between the two horizontal pins that secure the strap to the case. It is a very common width for field and aviator watches, allowing compatibility with a wide range of aftermarket straps.

For this 45 mm case, vegetable-tanned leather provides the strongest aesthetic coherence with its aviator heritage. Tuscan calf leather in dark brown or military green develops a rich patina over time and maintains harmonious proportions relative to the case diameter. Alternatively, a heavyweight cotton NATO strap or a satin rubber strap satisfies the practicality requirement during intensive use.

The Oris BC4 employs an integrated lug system: use a spring bar tool or specialised removal implement to compress the horizontal pins, extracting the worn strap from the lugs. Align the new strap holes with the pins and verify symmetrical engagement. No structural modifications to the case are required.

Yes, all straps with a 24 mm lug width are compatible with the 01 674 7633 4764 model. This width is standardised in watchmaking: leather, alligator, NATO, rubber, and synthetic materials in 24 mm format attach without modification. Always verify the lug width is 24 mm before purchase.

A quality vegetable-tanned leather strap, used daily in alternation with other straps, maintains structural integrity for 3–5 years. Longevity depends on frequency of use, exposure to humidity and heat, and periodic maintenance (cleaning, treatment with natural oils). Vegetable-tanned leather typically develops visible patina within the first 6–12 months of wear, without loss of functionality.