Strap for Speedmaster Broad Arrow Stainless Steel / Black / Bracelet / Olympic Timeless

The lug width of the 3557.50.00 is 20mm. This parameter indicates the width of the strap required to attach correctly to the case via the spring bars. Always verify the internal distance between the two attachment points, not the external width of the case, to avoid ordering errors.

The ideal strap depends on the intended use. For formal elegance, a dark brown alligator or black calf offer the best contrast with the anthracite black dial. For sports and everyday use, a NATO canvas strap or vulcanized rubber maintain the watch's professional character. Vegetable-tanned alligator represents the most versatile compromise, thanks to its patina that evolves naturally over time.

Strap replacement requires a specific tool (spring bar tool) to compress the small pins that secure the strap to the case. Position the tool in the designated side holes and gently push the pin toward the center, removing the strap. For installation of the new strap, align the holes with the pins and press until the locking click. If preferred, entrust the task to a professional to avoid scratching the case.

Yes, provided it is compatible with the 20mm lug width. High-quality aftermarket straps made in alligator, calf, shell cordovan, or technical rubber ensure complete mechanical compatibility. Ensure the strap has been correctly measured and that the attachment pins are properly sized to prevent unwanted movement.

The lifespan of a leather strap depends on the quality of the tanning and the intensity of use. An alligator strap with vegetable tanning typically lasts 3-5 years in daily use, while calf may require replacement sooner if subjected to mechanical stress. Vulcanized rubber tends to last longer. Regular maintenance—avoiding excessive moisture and dirt—significantly extends the useful life of any strap.