Strap for BC3 Advanced Day Date DLC / Black / Fabric

The lug width of this model is 22mm. This measurement defines the distance between the internal lugs of the case and determines compatibility with aftermarket watch straps. Measure the lugs using a calliper gauge on the internal wall to ensure accuracy.

For the BC3, we recommend straps in alligator or vegetable-tanned calf leather to emphasise the uncompromising technical character without sacrificing artisanal construction. An alligator in pearl grey or anthracite tone naturally dialogues with the rigorous geometry of the case. Alternatively, brushed calf in burgundy or cognac brown adds warmth whilst maintaining the instrumental identity. For intensive use, a robust NATO fabric or butadiene rubber strap provides extended practicality.

Position the watch with the case facing upwards and locate the lateral lugs. Using a spring bar tool or small screwdriver, gently press inward the small pin that supports each lug. The pin will retract, freeing the strap. Repeat on the opposite side. To install the new 22mm strap, align the holes with the lugs and press the pin until final engagement.

Yes, any strap with 22mm lug width is mechanically compatible with the Oris BC3 01 735 7641 4733-07 4 22 05B. However, we recommend selecting artisanal proposals that respect the technical identity of the watch. Always verify that the lugs are correctly positioned and that the strap has been constructed to this width standard.

The durability of an artisanal leather strap depends on frequency of use, environmental conditions, and care. A high-quality vegetable-tanned calf maintains structural functionality between 2 and 5 years of daily use. Exposure to perspiration, water, and UV rays accelerates aesthetic ageing, but this is part of natural patination. A vegetable-tanned alligator, due to its superior density, can extend to 7-8 years. Occasional lubrication with natural oils (such as castor oil) extends the useful life of the leather.