Strap for X-Series Stainless Steel / Blue / NATO

The X03-0902 features a 20-millimetre lug width. This measurement is taken between the inner shoulders of the lugs, perpendicular to the dial, excluding the case entirely. The 20mm standard is well-established and provides access to an extensive catalogue of artisanal straps, from traditional materials such as alligator and calf leather to technical solutions including NATO and rubber.

The choice depends on context and personal aesthetic. For understated elegance, vegetable-tanned alligator or shell cordovan deliver sophistication in contrast with the steel case. French saddle calf is ideal for those seeking versatility between formal and everyday wear. NATO straps ensure practical sportiness, whilst structured rubber options offer contemporary appeal. Recommended colour pairings include mahogany brown, cognac, pure black, or navy blue depending on the dial.

Replacing a strap on a 20mm lug width watch requires a spring bar tool or dedicated lever. After removing the watch from your wrist, insert the tool beneath the lug shoulder, extract the elastic bar pin, and release the strap from the case. The new strap—verifying it is the same 20mm width—is aligned by threading the bar pin into the corresponding slots. The procedure demands care to avoid scratching the case.

Yes, numerous manufacturers offer compatible 20mm straps. Specialist retailers such as Milano Straps provide a selection of genuine leather options (alligator, calf, shell cordovan), NATO straps, technical rubbers, and fabrics. It is essential to verify that the strap is manufactured for exactly 20mm lug width and equipped with appropriate spring bars. Selecting certified producers ensures both compatibility and longevity.

A quality leather strap—alligator, calf, or shell cordovan—on a wristwatch requires attentive maintenance. With moderate wear and protection from excessive moisture and direct sunlight, longevity ranges from two to five years. Vegetable-tanned leathers age gracefully, developing natural patina over time. Initial leather quality and frequency of wear are crucial variables. NATO and rubber straps typically demonstrate superior durability, resisting daily wear more effectively.