Oris · Big Crown

Strap for Big Crown Diamonds 38 Stainless Steel - Diamond / MOP

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 733 7649 4966-07 5 19 64
FamilyBig Crown
MovementOris caliber Oris 733 ND Hours, Minutes, Seconds
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 01 733 7649 4966-07 5 19 64, seen from the bench

The Big Crown represents one of the classic Oris lines, characterized by the oversized crown typical of pilot's watches. It mounts the automatic Oris 733 caliber with hour, minute and second indication. The case features 19mm lugs for the strap.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 733 7649 4966-07 5 19 64?

The lug width is 19mm. This measurement is critical for compatibility: 18mm or 20mm straps are not acceptable. The correct measurement is taken as the internal distance between the metal lugs protruding from the case.

Which strap is most suitable for the Big Crown 01 733 7649 4966-07 5 19 64?

Material choice depends on intended use and aesthetic preference. For formal elegance: grey or dark brown alligator. For daily versatility: vegetable-tanned calf leather in brown or burgundy tones. For aeronautical heritage: raw canvas or linen NATO strap. For humid environments: FKM rubber. For intense patina development: shell cordovan.

How do I change the strap on an Oris Big Crown?

The procedure requires minimal tools: a spring bar tool to extract the elastic pins securing the strap to the lugs. Position the tool in the groove beneath the lug, press gently upward to release the pin, extract the old strap. Insert the new strap by aligning the holes and repositioning the elastic pin until it snaps into place.

Can I use a third-party aftermarket strap compatible with the Big Crown 01 733 7649 4966-07 5 19 64?

Yes, provided the lug width is precisely 19mm. Bespoke artisanal straps manufactured to this specific width ensure seamless fit without anomalous gaps between the strap lugs and case lugs. Straps from milanostraps.it are engineered specifically for this compatibility.

What is the typical lifespan of a leather strap on an Oris watch?

Lifespan varies by material and usage: vegetable-tanned calf straps average 4–6 years with daily wear; alligator resists 5–7 years; shell cordovan, due to its structural density, can exceed 8 years. Exposure to perspiration, water and UV light accelerates deterioration. Preventive maintenance with natural oils significantly extends longevity.

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.

Request an appointment →

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