Oris · Big Crown

Strap for Oris Big Crown 01 754 7741 4085

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 4085
FamilyBig Crown
MovementOris caliber Oris 754 Hours, Minutes, Seconds | Date

Spring bar

Swiss Standard universal spring bars

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

The Big Crown 01 754 7741 4085, seen from the bench

The Oris Big Crown represents a collection dedicated to aviation with a functional dial design. It is powered by the Oris 754 caliber with hour, minute, second and date indication. 40mm stainless steel case with 20mm lugs.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 754 7741 4085?

The lug width of the Big Crown 01 754 7741 4085 is 20 mm. This dimension, measured between the case lugs where the strap attaches, is essential for selecting compatible straps. To verify it, remove the original strap and measure the space with a digital calliper.

Which strap do you recommend for the Oris Big Crown 01 754 7741 4085?

For the Big Crown 01 754 7741 4085, we recommend alligator with vegetable tanning (black, grey, cognac) or Tuscan calf leather (brown, tobacco, bottle green). These materials respect the tool watch soul of the watch without compromising Swiss elegance. NATO straps in high-density cotton are valid for rugged daily wear. Rubber is ideal for high-humidity environments.

How do you change the strap on the Oris Big Crown 01 754 7741 4085?

The strap is replaced by removing the spring bars that secure it to the case lugs. Use a dedicated spring bar tool to compress the inner spring, extract it from one side, then from the old strap. Insert the new spring bar into the aftermarket strap, position it in the lug seat and let it click into place. Verify it is centred: the bar should not protrude beyond the lugs.

Does the Oris Big Crown 01 754 7741 4085 accept aftermarket straps?

Yes, the Big Crown 01 754 7741 4085 is fully compatible with aftermarket straps of 20 mm lug width. Milano Straps offers a selection of leather, NATO and rubber verified for size and construction quality. Make sure the strap is specifically 20 mm and not generic: precision in adapting to Oris lugs is critical.

How long does a leather strap last on the Oris Big Crown 01 754 7741 4085?

A quality leather strap (alligator or Tuscan calf with vegetable tanning) lasts on average 3 to 5 years with conscious daily wear. Longevity depends on skin perspiration, direct sun exposure and environmental humidity. A Tuscan strap develops patina over time, becoming darker and more characterful. Periodic maintenance (cleaning with damp cloth, protection with natural wax) 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