Strap for Big Crown Pointer Date 40 Stainless Steel - Bronze / Blue

The lug width is 20mm, measured from the inside of one lug to the inside of the opposite lug, excluding the case. This dimension is specific to the Big Crown model in the 40mm version and is essential for selecting compatible aftermarket straps. Always verify manufacturing tolerance: Oris maintains 20.0mm nominal with minimal variations within ±0.5mm.

The ideal strap depends on intended use. For daily elegance, we recommend alligator or vegetable-tanned calf in brown, cognac, or black tones: they emphasise the bronze patina and age in parallel. For authentic avionic application, a NATO canvas strap in military green or grey enhances tool-watch identity. FKM rubber is the practical choice for marine or extreme climatic environments, maintaining constructive refinement.

Strap replacement requires a spring bar removal tool. Position the watch on a stable surface, gently press the pin upward from below to disengage it from one side, slide the strap, and repeat on the other side. Insert the pin into the seat of the new strap ensuring it is perfectly centred. The operation is reversible and requires no watchmaking expertise. Those uncomfortable with the process can entrust the task to professional ateliers.

Yes, provided they respect the 20mm lug width and the belly thickness does not exceed 4-5mm for true curvature. Milano Straps designs straps specifically for this reference and maintains construction standards equivalent to the original bracelet. Always verify that the lug is proportionate to the 40mm case diameter to avoid visual imbalance.

A vegetable-tanned calf strap, worn daily on an Oris Big Crown 01 754 7741 4365-07 5 20 71, maintains structural and aesthetic integrity for 18-24 months. Longevity depends on climatic factors, skin perspiration, sun exposure, and cleaning frequency. A well-maintained strap—regularly dried, protected from extreme humidity—can extend durability to three years. Alligator, thanks to denser fibre structure, exhibits slightly superior resistance.