Strap for Big Crown ProPilot Altimeter Meter / Black Leather

The lug width is 23 millimetres. This measurement corresponds to the distance between the internal lugs (pins) of the case. Any strap compatible with this width will fit your watch perfectly. Measuring the lug width is essential before ordering an aftermarket strap to avoid compatibility issues.

There is no single 'best' strap, only informed choices based on intended use. For formal aesthetics, an alligator strap with vegetable tanning enhances heritage character. For daily practicality, structured calf leather offers longevity and reliability. For operational contexts, resistant NATO straps and vulcanised rubber guarantee maximum functionality. The 47mm case supports robust straps with 4.5–5mm thickness well.

Place your watch on a soft, flat surface. Locate the lugs (horizontal metal pins) on both sides of the case. Use a spring bar tool to compress the internal springs, releasing the pins from the old strap's slots. Repeat on the opposite side. Insert the pins into the slots of the new strap, ensuring the springs click firmly into position.

Any strap with a 23-millimetre lug width is compatible. Milano Straps offers a dedicated range of artisan straps in structured leather, alligator, military NATO, and rubber, all crafted to specification and verified for ProPilot compatibility. Each strap is supplied with standard 23mm spring bars.

A quality leather strap, featuring vegetable tanning and artisan construction, typically lasts 5–7 years with moderate daily use. Longevity depends on humidity, frequency of wear, and maintenance. Well-cared-for leather develops a rich patina and becomes increasingly beautiful over time. Rubber, conversely, offers superior resistance in challenging environments (water, intense perspiration) but may lose elasticity after 3–4 years of constant stress.