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Oris · ProPilot

Strap for Big Crown ProPilot Altimeter Rega / Feet

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

23mm
23 mm strapsAll Oris
Lug width23 mm
Case diameter47 mm
Reference01 733 7705 4234-Set5 23 16GFC
FamilyProPilot
MovementOris caliber Oris 733 hours, minutes, seconds | date
Year2016 - 2021
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

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The ProPilot 01 733 7705 4234-Set5 23 16GFC, seen from the bench

The Oris ProPilot 01 733 7705 4234-Set5 23 16GFC is a 47mm stainless steel professional pilot watch representing decades of Oris aviation watchmaking heritage. It features the Oris caliber 733 automatic movement with eccentric rotor, hours, minutes, seconds, and date display. The 23mm lug width is structurally essential to the balanced proportions of the 47mm case, determining compatibility with aftermarket straps from leather to technical textiles and vulcanized rubber.

Frequently asked questions

What is the exact lug width of the Oris ProPilot 01 733 7705 4234-Set5 23 16GFC?

The lug width of the Oris ProPilot 01 733 7705 4234-Set5 23 16GFC is precisely 23mm. This measurement defines the distance between the two case lugs where the strap attaches. It is a critical specification to ensure perfect compatibility and stable strap positioning.

Which strap material is most suitable for the Oris ProPilot 47mm?

For the ProPilot 47mm, we recommend American alligator leather in substantial thickness (1.5mm) for uncompromising elegance, or vegetable-tanned calf for a patina that develops naturally over time. A Cordura NATO strap or vulcanised rubber is ideal for professional and sporting contexts, delivering robustness and ease of use.

How do you change the strap on this Oris timepiece?

Strap replacement is accomplished via the removable lugs (spring bars) that connect the strap to the case. Using a dedicated spring bar removal tool or small lever, compress the internal spring mechanism of the lug to allow strap extraction and installation of a new one. The procedure demands care to avoid case damage.

Are aftermarket straps compatible with the ProPilot 01 733 7705 4234-Set5 23 16GFC?

Yes, entirely. All straps with a 23mm lug width are fully compatible. Milano Straps curates a selection of premium leather straps, technical fabrics, and rubber options, each chosen to dialogue visually and tactilely with the avionic aesthetic of the Oris case.

How long does a leather strap last on a watch like the ProPilot?

A quality leather strap, whether alligator or calf, typically lasts 5-7 years with regular daily wear. Longevity depends on exposure to moisture, perspiration, UV radiation, and frequency of use. Periodic maintenance—cleaning and conditioning with specialist creams—significantly extends strap lifespan.

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