Oris · Big Crown

Strap for Big Crown Pointer Date 40 Stainless Steel / Black / Strap

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference01 754 7741 4064-07 5 20 64
FamilyBig Crown
MovementOris caliber Oris 754 hours, minutes, seconds | date
Year2018
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 01 754 7741 4064-07 5 20 64

Selected for the 20 mm lug width

All 20 mm straps →

The Big Crown 01 754 7741 4064-07 5 20 64, seen from the bench

The Oris Big Crown Pointer Date 40 Stainless Steel reference 01 754 7741 4064-07 5 20 64 inherits from Swiss aviation chronographs of the Golden Age. It features a 40mm stainless steel case, the reliable Oris 754 automatic caliber with hours, minutes, seconds and date functions, and 20mm strap lugs. The unidirectional bezel, high-contrast dial and mechanical movement deliver concrete instrumental performance rooted in utilitarian robustness.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 754 7741 4064-07 5 20 64?

The lug width is 20mm. This measurement represents the horizontal distance between the two lateral metal attachment points on the case. All compatible straps must have an external width of exactly 20 millimetres to fit correctly without lateral play.

What is the best strap for the Oris Big Crown 01 754 7741 4064-07 5 20 64?

The choice depends on intended use and aesthetic preference. For historical authenticity, we recommend vegetable-tanned alligator or calf leather with natural patina. For tactical versatility, a cotton-nylon or Cordura NATO. For scientific practicality, FKM rubber. A shell cordovan deployante on a NATO base reconciles elegance with functionality.

How do you change the strap on the Oris Big Crown 01 754 7741 4064-07 5 20 64?

Use a spring bar removal tool (small bifurcated screwdriver). Insert the tip beneath the small horizontal metal pin that holds the strap, gently push inward toward the case to release one end, and extract the strap. Repeat on the opposite side. To install, align the new strap, insert the spring bar through the lateral holes, and press until you hear a click.

Which aftermarket strap is compatible with the Big Crown 01 754 7741 4064-07 5 20 64?

Any strap with a 20mm lug width is compatible. The milanostraps.it collection offers straps in alligator, calf, nylon, Cordura, and rubber, all engineered for this specific width. Always verify lug width before purchase to avoid incompatibility.

How long does a leather strap last on the Oris Big Crown 01 754 7741 4064-07 5 20 64?

A noble leather strap (alligator, calf, shell cordovan) lasts approximately 3–5 years in daily use, provided regular maintenance: drying after moisture exposure, cleaning with a soft cloth, periodic application of protective balm. Vegetable tanning develops natural patina over time, increasing aesthetic character. Water absorption accelerates wear; avoid prolonged immersion.

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