Strap for Big Crown ProPilot Calibre 114 Stainless Steel / Grey / Alligator

The lug width of the ProPilot is 22mm. This measurement is taken by positioning a digital calliper between the two inner lugs that held the original strap. Always measure from the centre of one lug to the centre of the opposite lug, perpendicular to the case's longitudinal axis.

The choice depends on your intended use. For formal contexts, we recommend vegetable-tanned alligator or shell cordovan: both maintain the model's versatility. For operational or daily use, recycled NATO straps (aviator blue or military green) embody the instrumental identity without compromise. For marine or wet environments, naturally vulcanised rubber is unbeatable.

Obtain a spring bar tool or a thin credit card. Support the watch and locate the lateral spring bars beneath the lugs. Press the bar lightly downward to release the internal spring, then remove the old strap. Align the new 22mm strap with the lugs and reinsert the spring bars until you hear a slight click. Verify that the strap sits symmetrically relative to the case.

Yes, provided the lug width is exactly 22mm. Always verify the seller's specifications. Quality aftermarket straps with correct thickness (typically 4–5mm total for this size) will install without issue. Avoid straps with pre-mounted spring bars if your case lugs require adjustment.

A quality leather strap on a watch of this mass—the ProPilot exceeds 140 grams—experiences significant mechanical stress. With moderate daily use, expect 18–36 months before the leather shows signs of failure at the attachment points or creases. Alligator and shell cordovan age more gracefully. Rotating with alternative straps (NATO, rubber) significantly extends the lifespan of each individual strap.