Strap for Big Crown Original Pointer Date 40 Bronze / Green / 80th Anniversary

The lug width of the Oris Big Crown 01 754 7741 3167-07 5 20 58BR is precisely 20mm. This standard width allows for compatibility with a wide range of artisanal and aftermarket straps without requiring case modifications. To verify compatibility, measure the distance between the two lugs (pins) of the case; it should be exactly 20mm.

For the Big Crown in bronze and stainless steel, we recommend vegetable-tanned leather straps in cognac or dark brown: the aged leather creates a natural dialogue with the emerging bronze patina. Alternatively, a canvas NATO in smoke grey emphasises the original aviation heritage, whilst alligator in brown suggests a more formal universe. Technical rubber straps offer a modern counterpoint, perfect for those wishing to maintain instrumental character without sacrificing daily comfort.

Strap changes are accomplished by extracting the spring bars (pins) that connect the strap to the case. Using a dedicated spring bar tool with two ball ends, apply gentle pressure beneath the pin to slide it out of its housing: the strap will detach. For remounting, align the holes of the new strap with the case lugs, insert the pin and allow it to engage naturally. No permanent tools on the case are required. Casati Milano provides personalised assistance if you prefer a professional service.

Yes, any 20mm strap is compatible. Artisanal aftermarket straps (leather, NATO, rubber) install using the same spring bar mechanism as the original configuration. Milanostraps.it offers a curated selection of 20mm straps in noble materials: vegetable-tanned leather, shell cordovan, alligator, and technical fabrics. Constructive compatibility is assured; aesthetic choice remains entirely in your hands.

A leather strap's lifespan depends on usage, climate and care. Under normal conditions (moderate daily use, absence of extreme humidity), a quality artisanal leather strap maintains structural integrity between 3 and 5 years. Vegetable tanning evolves naturally, developing controlled patina and wear; shell cordovan, more resistant, can exceed 7 years. Prolonged exposure to humidity, corrosive perspiration or excessive heat shortens this window. Casati Milano recommends alternating straps and periodically cleaning them with a soft, dry cloth.