Strap for Oris Big Crown 01 754 7785 4094

The lug width is 19mm. This dimension represents the distance between the spring bars that attach the strap to the case. To verify, measure the internal distance between the centres of both spring bars using a digital calliper. A 19mm lug width provides access to a broad selection of artisanal straps, ranging from vegetable-tanned leather to NATO fabric or FKM rubber options.

A vegetable-tanned Tuscan leather strap in brown or black offers the most coherent pairing with the model's historical tool-watch aesthetic. Recommended thickness: 3.5–4.5mm to maintain balanced proportions. Alternatively, a grey or beige cordura NATO respects the watch's aviation heritage, whilst FKM rubber is optimal for aquatic or active use.

Remove the current strap by gently pushing the lateral spring bars downward with a non-cutting tool (spring bar tool). Once the spring mechanism is released, extract the strap. Insert the new strap—ensuring the lug width is 19mm—by aligning the holes with the case lugs, then secure the spring bars back into position. If uncertain, consult an authorised service centre to avoid case damage.

Any strap with a 19mm lug width is compatible. Oris does not restrict use to original products exclusively. You may select from vegetable-tanned leather, alligator, shell cordovan, NATO fabric, FKM rubber, or even canvas fabric options. Artisanal quality enhances user experience and enables customisations impossible with standard alternatives.

A high-quality vegetable-tanned Tuscan leather strap has a lifespan of 4–7 years with moderate wear (4–5 days weekly). Vegetable tanning develops a natural patina that increases its character, but requires periodic maintenance: hydration with specialist creams every six months and protection from excessive moisture. Ageing accelerates in marine environments or high-humidity zones. FKM rubber has superior longevity (8–10 years) but does not acquire character over time.