Strap for Big Crown Complication Stainless Steel - Rose Gold / Black / Bracelet

The lug width of the Oris Big Crown 01 581 7627 4364-07 8 20 78 is 20 millimetres. This width is measured as the internal distance between the two spring bars that connect the case to the strap. Any strap with a 20mm attachment will be perfectly compatible with this model. You can verify the correct measurement using a calliper or by consulting the manufacturer's technical specifications.

For the Big Crown 01 581 7627 4364-07 8 20 78, straps in shell cordovan or vegetable-tanned alligator leather offer the best balance between aesthetics and durability. Dark brown shell cordovan creates elegant contrast with the black dial and develops a rich patina with wear. For an informal approach, NATO fabric straps or vulcanised FKM rubber echo the model's avionic origins. The choice depends on your personal style and intended daily use.

To change the strap, you will need a specialised tool called a spring bar tool. With the watch positioned on a stable surface, insert the tip of the tool into the small slot on the lug – the pin connecting the case to the strap – and apply gentle pressure to compress the internal spring. Once compressed, the lug will extract and the old strap will release. The new strap is inserted in the same manner, aligning the side holes with the spring bars. It is advisable to proceed slowly to avoid damaging the case.

All straps with a 20-millimetre lug attachment are compatible with the Big Crown 01 581 7627 4364-07 8 20 78. This includes straps in alligator leather, calf, shell cordovan, suede, NATO fabric, FKM rubber and synthetic materials. Milano Straps offers a selection of handcrafted straps made to measure at the Casati Milano atelier, all ready for shipment and customisable according to your colour and material preferences.

The lifespan of a leather strap depends on the material, craftsmanship and usage patterns. A shell cordovan strap with vegetable tanning, worn daily, has an expected lifespan of 5-7 years before showing significant signs of wear. A standard alligator or calf strap typically lasts 3-5 years with regular use. The patina that develops is part of the leather's natural aesthetic evolution. To extend lifespan, it is advisable to alternate between different straps and protect the leather from excess moisture and direct heat.