Strap for Big Crown ProPilot GMT Rega Fleet AgustaWestland Da Vinci - HB-ZRT

The lug width is 20 mm, which is the distance between the two lugs on the case. Measurement is taken from the centre of one lug to the centre of the other, perpendicular to the case surface. This dimension is standard for the ProPilot family and ensures balanced proportions between the 41.50 mm case and the strap.

The choice depends on intended use: full-grain leather (European calf or alligator) for elegance and daily versatility; cotton/polyester NATO for practicality and quick changes; vulcanised rubber for saltwater environments and tropical climates. For professional aviation use, a leather strap with natural patina or a NATO in traditional shades maintains the watch's instrumental identity.

With the original strap, removal is accomplished by extracting the spring bar pins connecting the strap to the case lugs. A spring bar tool simplifies the operation. Insert the new strap by aligning the pins with the lug holes, ensuring the pins click securely into position. If using a deployante clasp, verify alignment before wearing the watch.

Yes, any strap with a 20 mm lug width is compatible. Independent manufacturers offer options in leather, NATO, rubber and technical materials. Verify that the strap features lugs or slots of the correct width and that the anchor pins are quality-grade (stainless steel or titanium) to prevent corrosion.

A full-grain leather strap with vegetable tanning typically lasts 3–5 years with conscious daily wear. Durability depends on solar exposure, humidity, perspiration and maintenance (periodic cleaning, annual water-repellent treatment). A shell cordovan strap, owing to its density, can last 7–10 years. Rubber retains elasticity for 4–6 years before replacement becomes necessary.