Oris · ProPilot
Strap for Big Crown ProPilot Altimeter Feet / Black Textile
Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
The ProPilot 01 733 7705 4134-Set 5 23 15FC, seen from the bench
Frequently asked questions
What is the exact lug width of the Oris ProPilot 01 733 7705 4134-Set 5 23 15FC?
The lug width is 23mm. This measurement represents the distance between the two spring bars on the case. All straps compatible with a 23mm lug width will fit this model perfectly without any modification.
Which strap would you recommend for the ProPilot 01 733 7705 4134-Set 5 23 15FC?
Selection depends on intended use and aesthetic preference. For refined elegance: alligator or vegetable-tanned calf in warm tones. For aviation heritage: NATO in technical fabric. For daily versatility: calf with natural patina in brown or navy blue. For technical environments: FKM rubber or synthetic textile. Milano Straps supplies all these artisanal solutions in 23mm width.
How do you change the strap on an Oris ProPilot?
Strap replacement requires a precision spring bar tool. Position the watch securely, locate the spring bars at 12 and 6 o'clock, insert the tool into the slot and gently push to retract the bar. Remove the old strap, insert the new one, and release until the bar clicks into place. For professional installation, Milano Straps and Casati Milano offer in-atelier service.
Are aftermarket straps compatible with the Oris ProPilot?
Yes, provided the lug width is 23mm. Milano Straps manufactures certified quality artisanal straps in this specific measurement, available in alligator, calf, NATO leather and rubber. Compatibility is guaranteed through standardised spring bar dimensions on this model.
What is the typical lifespan of a leather strap on a watch like the ProPilot?
A quality vegetable-tanned leather strap, such as those from Milano Straps, typically lasts 3–5 years with moderate daily wear. Longevity depends on humidity, temperature, frequency of wear, and maintenance. Leather develops a natural patina over time, acquiring character. Rubber and NATO straps perform longer in humid or high-stress environments.
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only