Strap for Big Crown ProPilot Worldtimer Stainless Steel / Grey

The lug width of the ProPilot 01 690 7735 4063-07 1 22 72FC is 22mm. This specification should be verified by measuring the exact distance between the two horizontal lugs (spring bar holes) protruding from the case. A measurement error can compromise strap compatibility. We recommend using a digital calliper for maximum accuracy.

This depends on your intended use and aesthetic preferences. For formal-casual contexts, a vegetable-tanned leather or alligator strap is ideal. For tactical or daily wear, a ballistic NATO or FKM rubber strap is recommended. Vegetable-tanned leather ages visibly with character; NATO offers quick-change capability and dual security lug; rubber guarantees practicality in marine or humid environments.

Strap replacement is achieved by extracting the spring bars that hold the strap to the lugs. Use a spring bar tool and insert the tip under each bar, pressing gently to release the spring; extract the bar. Repeat on both sides. Insert the new spring bars into the replacement strap and press them securely into the lugs, applying uniform pressure.

Yes, provided it respects the 22mm lug width specification. Any strap compatible with this width—leather, NATO, rubber, alligator—can be mounted. We advise against unknown brands that do not specify construction tolerances: an oversized lug can damage the case pins.

A traditionally vegetable-tanned leather strap lasts 3-5 years of daily wear, developing a patina that increases aesthetic value. Alligator achieves 7-10 years owing to its denser fibre structure. Longevity depends on environmental conditions (humidity, perspiration, UV exposure) and maintenance. A NATO strap in ballistic fabric lasts 5-8 years if well maintained; rubber typically lasts 4-6 years before losing elasticity.