Strap for Big Crown ProPilot Calibre 111 Stainless Steel / Grey / Alligator

The lug width of the Oris ProPilot 01 111 7711 4163-Set 1 22 72FC is precisely 22 millimetres. This is the distance between the two spring bar pins that connect the strap to the watch case lugs. You can verify this by measuring directly between the lug holes with a digital calliper, or by consulting the warranty certificate supplied with your timepiece.

The Oris ProPilot, given its 44mm diameter and avionic vocation, performs best with three options: Italian vegetable-tanned leather with 1.4mm thickness (which develops patina over time), a ballistic nylon NATO for military-sporting use, or FKM rubber with steel deployante for underwater use. Your choice depends on your wearing context. For elegant daily wear we recommend leather; for outdoor and active pilots, NATO; for marine use, rubber.

The strap on an Oris ProPilot is replaced using a specialised tool called a spring bar tool. Locate the two small metal pins that run through the case lugs. Insert the flat tip of the spring bar tool into the small hole on one of the pins and gently push towards the centre of the case to eject the pin from its hole. Repeat on the other side. Then align the new strap's spring bars with the lugs and reinsert the pins using the tool again.

Yes, any strap fitted with 22mm spring bars is fully compatible with the Oris ProPilot 01 111 7711 4163-Set 1 22 72FC. Compatibility is determined solely by lug width, not by brand. You can fit leather, NATO, rubber, silicone rubber, ballistic fabric or rexine straps, provided the distance between the pins is 22mm. Always verify strap length against your wrist circumference.

The lifespan of a leather strap (European vegetable tanning) on a sports-avionic watch such as the Oris ProPilot depends on use and maintenance. Under moderate daily wear conditions, a quality artisanal leather strap lasts between 18 and 36 months. Exposure to direct sunlight, extreme heat and humidity accelerates ageing. If the strap is regularly exposed to water (showering, swimming), lifespan drops to 12–18 months. We recommend applying a beeswax-based protective treatment every three months and drying the strap promptly after moisture contact.