Oris · Big Crown

Strap for Big Crown Diamonds 38 Stainless Steel / 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 4066-07 5 19 67
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

Straps for the Big Crown 01 733 7649 4066-07 5 19 67

Selected for the 19 mm lug width

All 19 mm straps →

The Big Crown 01 733 7649 4066-07 5 19 67, seen from the bench

The Oris Big Crown 01 733 7649 4066-07 5 19 67 is a contemporary evolution of an icon born from 1930s aeronautical heritage. It features the Oris 733 ND automatic caliber and a 38mm stainless steel case designed for professional use. The 19mm lug width ensures harmonious proportions and compatibility with standard straps, maintaining the tool watch heritage that defines the Big Crown collection.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 733 7649 4066-07 5 19 67?

The lug width of this model is 19mm. This measurement represents the distance between the two lugs that connect the case to the strap. To verify it, observe the distance between the metal pins or consult the watch's original documentation. This measurement is crucial for selecting the correct strap and ensuring compatibility without compromise.

What is the best strap for the Oris Big Crown 01 733 7649 4066-07 5 19 67?

There is no absolute 'best' choice, but rather selections motivated by intended use and desired aesthetics. For pure avionic character: NATO in high-density polyamide or FKM rubber. For classical elegance: polished alligator or vegetable-tanned leather. For legendary durability and remarkable patina: shell cordovan. For everyday versatility: soft calf leather in neutral colours. Each material transforms the watch's character distinctly.

How do you change the strap on an Oris Big Crown 01 733 7649 4066-07 5 19 67?

The procedure requires a specific tool (spring bar tool or lug removal pin). Identify the two metal pins at the case ends connecting the strap. Insert the tool into the pin's slot to depressurize the internal spring, then extract the pin. Repeat on the other side. Insert the pins into the new strap, aligning the guides, then re-insert the pins into the case until they click into place. Some prefer entrusting this task to a qualified watchmaker for precision and case protection.

Is an aftermarket strap compatible with the Big Crown 01 733 7649 4066-07 5 19 67?

Yes, provided it is specifically dimensioned for 19mm lug width. Milano Straps offers an extensive selection of artisanal straps in leather, NATO, and rubber, all compatible with this reference. Compatibility is guaranteed by the lug width specification: any 19mm strap will fit perfectly on the case. Quality and finishing vary significantly depending on the manufacturer and material selected.

How long does a leather strap last on a watch like the Oris Big Crown 01 733 7649 4066-07 5 19 67?

A high-quality vegetable-tanned or alligator leather strap typically lasts 2-4 years under daily, moderate use. Longevity depends on material type (shell cordovan exceeds 5-6 years), environmental conditions (humidity and heat accelerate wear), frequency of use, and maintenance practices. A corroded spring bar or deployant, or leather exposed to excessive perspiration, shortens useful life. Periodic oiling and keeping the strap dry significantly extend durability.

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