Strap for Speedmaster Professional Moonwatch Racing / TinTin

The lug width of the Moonwatch 311.30.42.30.01.004 is 20mm. This width is specific to the model and allows you to use all commercially available 20mm straps. To measure your current strap's lug width, place a ruler on the inner part and measure the distance between the pin axes: it must be exactly 20mm.

The best strap depends on your intended use. For formal and everyday environments, we recommend vegetable-tanned dark brown alligator or shell cordovan: both develop a natural patina over time. For a sporty style, grey or black NATO fabric remains true to the Moonwatch's military heritage. Vegetable-tanned calf leather is ideal if you prefer softness and aesthetic simplicity.

The strap is changed by removing the spring bars that connect the strap to the case. Using a dedicated tool or a blunt knife, gently press the spring bar to release the internal spring, then extract the bar itself. Position the new strap by aligning the side holes with the spring bars, then reinsert the bars until they click into place. The operation takes just a few minutes and requires no specialized tools.

Yes, any strap with a 20mm lug width is compatible with the 311.30.42.30.01.004. Artisanal straps from milanostraps.it are designed specifically for this width and offer superior quality compared to standard straps. It is essential to verify that the new strap has exactly 20mm to avoid play or misalignment.

The lifespan depends on the material and usage. An alligator or shell cordovan strap in vegetable tanning typically lasts 5-7 years with daily wear, thanks to its natural durability. Calf leather, which is more delicate, lasts 3-5 years. The frequency of wear, exposure to sunlight and humidity significantly affect longevity. Superior quality artisanal straps, such as those from Casati Milano, offer 18-month warranties and provide repairs and replacements with ease.