Strap for Big Crown ProPilot GMT Rega Fleet Bombardier Challenger 650 - HB-JWB

The lug width is 20 mm. This specific measurement is characteristic of this model and determines the compatibility of any replacement strap. To verify that a strap is suitable, measure the internal distance between the case lugs using a digital calliper: the value must be exactly 20 mm.

The choice depends on the intended use. For a professional aviation context, we recommend alligator with vegetable tanning, which combines elegance with natural patina development over time. A dark brown vegetable-tanned calf offers aesthetic versatility. For pilots who subject the watch to extreme conditions, a NATO cordura strap guarantees maximum practicality. Fluoroelastomeric rubber is ideal if you seek superior grip and resistance to thermal fluctuations.

To change the strap, you must remove the spring bars that anchor the strap to the case lugs. Use a dedicated spring bar tool or, in its absence, a very thin flat blade. Insert the tool under the spring bar from the inner side, push gently upward until one end of the strap is freed, then extract the spring bar completely. Repeat for the other lug. Insert the new strap by aligning the holes and reposition the spring bar: you should feel a small safety click.

Yes. Milano Straps offers a complete selection of 20 mm straps in various materials: alligator leather, vegetable-tanned calf, NATO fabric and rubber. All are designed to ensure total compatibility with the ProPilot lugs and construction quality commensurate with an instrument of this technical significance. They are ready for shipment and customisable according to personal preferences.

A quality artisanal vegetable-tanned leather strap typically lasts 3-5 years with daily wear, depending on exposure to humidity and perspiration. The 20 mm lug width, being relatively compact, distributes stress evenly, reducing concentrated wear points. Periodic maintenance (gentle cleaning, light conditioning with natural oils) significantly extends useful life. The advantage of vegetable-tanned leather is that it ages beautifully, developing patina and character, rather than deteriorating abruptly.