Oris · Big Crown

Strap for Big Crown Pointer Date 38 Hölstein Edition

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter38 mm
Reference01 403 7776 4083-Set
FamilyBig Crown
MovementOris caliber Oris 403 Hours, Minutes, Small Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Big Crown 01 403 7776 4083-Set, seen from the bench

The Oris Big Crown mounts the automatic calibre 403 with hour, minute, small seconds and date indication. The watch features 19mm lugs and belongs to the brand's aviation collection. The movement offers essential functions for daily use with the typical robustness of Oris timepieces.

Frequently asked questions

What is the exact lug width of the Oris Big Crown 01 403 7776 4083-Set?

The lug width is 19mm. This specification is critical when purchasing a compatible strap. To verify, measure the distance between the two lug holes on the case: it must be precisely 19mm. Straps sized at 18mm or 20mm will create unwanted play or insertion difficulties.

What strap do you recommend for the 38mm Big Crown Oris?

We recommend American alligator for those prioritising aesthetics and longevity, vegetable-tanned calf leather for a more classical, evolving appearance, silk-cotton NATO for versatility and practicality, or FKM rubber for sports-oriented use. Your choice depends on intended use and colour preference. All materials are available in 19mm configuration.

How do I change the strap on this Oris timepiece?

Remove the watch from your wrist. Position the Big Crown face-up on a soft surface. Use a spring bar removal tool to depressurise the lug spring. Insert the flat end of the tool into the small hole beneath the lug and push gently downward to release tension. Remove the old strap, insert the new one, and verify that the spring is positioned correctly.

Are aftermarket straps compatible with reference 01 403 7776 4083-Set?

Yes, provided the lug width is certified at 19mm. Third-party straps manufactured to this specification are fully compatible. Avoid generic compatibility claims (such as straps merely labelled "Oris 38mm"): always verify the nominal lug width. Our artisanal straps are engineered to tight tolerance for precise fit.

How long does a leather strap last on this watch?

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3–5 years of daily wear before showing signs of wear at stitching and edge. Colour patina begins to manifest after 6–12 months. Humidity, direct sunlight exposure, and perspiration accelerate the natural cycle. Periodic maintenance with natural wax or strap-specific balm extends the useful life without altering the leather's character.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only