Strap for Speedmaster Moonwatch Co-Axial Stainless Steel / White

The lug width is 21 mm. This dimension is specific to this oversized Speedmaster model and is not interchangeable with 20 mm straps or other sizes. The measurement should be taken between the spring bars that connect the strap to the case lugs.

The choice depends on intended use: alligator with vegetable tanning in cognac or black tones for sartorial elegance; structured calf for conscious aging potential; vulcanized rubber for performance in extreme conditions. The satin-finished steel deployant represents the natural complement for any leather strap.

Remove the original strap using a spring bar removal tool to extract the bars from the case lugs. Insert the new 21 mm strap by aligning the holes with the bars, ensuring that the inner loop is perpendicular to the case. Verify that there is no lateral play before use.

No, a 20 mm strap would create undesired lateral play and compromise both aesthetics and functionality. The 21 mm lug width is specific to this model and is not interchangeable with smaller sizes. We recommend using only certified 21 mm straps.

Durability varies based on leather type and conditions of use: alligator and shell cordovan guarantee 4-6 years of regular wear; structured calf 3-5 years; more delicate leathers 2-3 years. Conscious aging of the leather increases aesthetic appeal over time, making the strap an evolving component of the watch.