Oris
Big Crown 01 754 7779 4065-Set— lug 19mm

The lug width is precisely 19mm, a specialist measurement that requires dedicated straps to ensure correct fit between the lugs and the strap keeper. It is not compatible with standard 18mm or 20mm straps.

For daily wear and formal occasions, an alligator or vegetable-tanned calf leather strap offers elegance and natural patina. For frequent diving, a thick NATO or FKM rubber ensures water resistance and rapid drying. A deployante clasp is always recommended for security and practicality.

Changing requires a dedicated spring bar tool to remove the spring bars retaining the old strap. Position the tool in the small hole beneath the keeper, press gently to release the bar, then remove the old strap. Insert the new bar into the lower opening of the 19mm strap and snap it into the case seats. Verify the strap is centred.

Yes, provided it is manufactured specifically for 19mm lug width. Milano Straps offers leather, NATO, and rubber straps compatible with the Oris Big Crown 01 754 7779 4065-Set. We always recommend verifying exact width before purchase to avoid aesthetic compromise.

A vegetable-tanned leather strap lasts 18–36 months with daily wear, especially if regularly exposed to saltwater. Prolonged humidity exposure accelerates fibre ageing. For frequent diving, rubber or NATO straps are more economical and durable (24–48 months). Rotating between straps extends the lifespan of each piece.