Oris · Big Crown

Strap for Big Crown Original Pointer Date 40 Bronze / Brown / Bracelet

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 3166-07 8 20 01
FamilyBig Crown
MovementOris caliber Oris 754 hours, minutes, seconds | date
Year2022
CaseBronze, Stainless 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 3166-07 8 20 01

Selected for the 20 mm lug width

All 20 mm straps →

The Big Crown 01 754 7741 3166-07 8 20 01, seen from the bench

The Oris Big Crown 01 754 7741 3166-07 8 20 01 is the contemporary evolution of an icon originally designed in 1938 as a flight instrument for Royal Air Force pilots. It features the signature oversized crown, originally conceived to be operated with flying gloves in the cockpit. The case measures 40mm in diameter and is available in bronze, which develops a characteristic patina over time. The watch is powered by the Oris 754 automatic Swiss movement. The 20mm lug width is compatible with a wide range of aftermarket straps.

Frequently asked questions

What is the exact lug width of the Oris Big Crown 01 754 7741 3166-07 8 20 01?

The lug width of this model is 20mm. This dimension is measured between the two lugs (the protrusions from the case) and is the essential parameter for selecting compatible straps. You can verify the measurement using a digital calliper positioned perpendicular to the lugs.

What is the best strap for the Oris Big Crown 01 754 7741 3166-07 8 20 01?

It depends on usage and personal preference. For a formal-sporting context, we recommend a vegetable-tanned calfskin or shell cordovan strap, which pairs naturally with the patina of the bronze case. For outdoor activities, a NATO strap in high-density cotton or a vulcanised rubber strap offers greater durability. The perfect choice is the one that reflects your wearing style.

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

The strap is changed by extracting the spring bars from the case lugs using a dedicated tool called a spring bar remover. Position the tool under the bar and apply slight upward pressure until the internal spring is released, then remove the old strap. Align the new strap holes with the lugs and reinsert the spring bars until you feel a click of engagement.

What aftermarket strap is compatible with the Oris Big Crown 01 754 7741 3166-07 8 20 01?

Any strap with a 20mm lug width is compatible. You can choose from the Milano Straps collection: full-grain leather with vegetable tanning, shell cordovan, cotton and nylon NATO, technical rubber straps. All our straps are tested to fit this size perfectly.

How long does a leather strap last on an Oris Big Crown?

Durability depends on leather quality, wearing frequency, and environmental conditions. A calfskin strap with vegetable tanning typically lasts 3-5 years with moderate daily use. Shell cordovan, thanks to its superior density, can last 7-10 years. Excessive humidity and prolonged direct sun exposure accelerate aging. Periodic maintenance (gentle cleaning, conditioning) significantly extends useful life.

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