Oris · ProPilot

Strap for Oris ProPilot 01 400 7784 8786

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

Lug width20 mm
Case diameter41 mm
Reference01 400 7784 8786
FamilyProPilot
MovementOris caliber Oris 400 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

Frequently asked questions

What is the lug width of the Oris ProPilot 01 400 7784 8786?

The lug width is 20 mm. This measurement represents the available space between the two mounting pins of the case where the strap is inserted. To verify correctly, use a digital calliper measured internally between the pins, not externally.

Which strap is recommended for the Oris ProPilot 01 400 7784 8786?

For this pilot tool watch, we recommend three solutions: alligator for aesthetic versatility and breathability in flight; vegetable-tanned calf leather for those desiring a patina that evolves over time; NATO in premium fabric for salted environments or prolonged outdoor activities. FKM rubber is ideal for military use or non-certified water resistance.

How do I change the strap on the Oris ProPilot 01 400 7784 8786?

Use a spring bar tool (two-pronged implement) to depress the elastic pins of the case from both sides simultaneously. Remove the used strap, insert the pins of the new strap into the case housings ensuring they click perfectly into both sockets. No permanent tool required: removal takes less than two minutes for experienced users.

Can I use a 20mm strap from another brand on the Oris ProPilot 01 400 7784 8786?

Yes, provided the strap is certified 20 mm and constructed with compatible spring-loaded barrels. Verify that the terminal width does not exceed 16–18 mm, otherwise it will not enter the case housings. Artisanal bespoke straps guarantee maximum compatibility.

What is the lifespan of a leather strap for the Oris ProPilot 01 400 7784 8786?

A high-quality alligator strap lasts 4–6 years of daily wear before the fiber visibly thins. Vegetable-tanned calf leather lasts 3–5 years but improves aesthetically with aging. Lifespan depends on ambient humidity, frequency of use, and maintenance (regular cleaning, rapid drying).

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