Strap for Big Crown Date Grey / Grey

The Oris Big Crown 01 733 7629 4263-07 5 22 79 has a lug width (or lug spacing) of 22mm—the precise distance between the case lugs where the strap is fitted. This dimension is specific to models requiring balanced proportions on significant case sizes (44mm). Measuring the lug width correctly ensures total compatibility with aftermarket straps.

For the Big Crown we recommend vegetable-tanned Tuscan leather in Havana or Dark Brown tones: it creates a natural dialogue with the satin-finished steel and develops a patina through aging that mirrors the case evolution. Alternatively, structured calf leather offers superior grip, whilst a NATO strap in cotton-polyester navy blue authentically references vintage pilot flight suits. FKM rubber represents the most technical and sporty option.

Changing the strap on an Oris requires minimal tools: a spring bar tool or small flathead screwdriver. Insert the tool gently into the groove of the internal spring, apply light pressure to compress it, extract the spring, and remove the old strap. Repeat the reverse procedure with the new strap. Simple operation, completed in under 2 minutes. If preferred, our Casati Milano ateliers offer in-store strap change service by appointment.

Yes, absolutely. All 22mm straps are compatible with the Oris Big Crown 01 733 7629 4263-07 5 22 79, regardless of brand or material. Milano Straps offers a dedicated 22mm strap catalogue in leather (Tuscan, calf, alligator), technical fabrics (NATO, canvas), and FKM rubber. Compatibility is guaranteed by international standardisation of lug width.

A quality leather strap on a heavy watch worn daily typically lasts 3–5 years. Vegetable-tanned Tuscan leather, if kept dry and not exposed to prolonged immersion, can achieve 5–7 years of service. Determining factors include: frequency of wear, climatic conditions, preventive care (periodic cleaning with a damp cloth), and natural wrist perspiration breathability. The Big Crown, with its 44mm case and movement weight, creates greater mechanical stress on the lug slots; therefore, rotating between at least two straps extends overall lifespan.