Strap for Speedmaster Split-Seconds Stainless Steel / Silver / Strap

The lug width is 20 mm net, measured perpendicularly between the pins that form the case-strap attachment. This width is specific to the 3840.30.32 model and is not compatible with 18 or 22 mm straps without lateral play.

The choice depends on usage: dark brown alligator (Cognac) offers aesthetic balance and tactile comfort; black brushed calf leather provides formality and practicality; shell cordovan ensures personality and noticeable aging; a textile NATO strap remains the most robust solution for sports contexts.

Use a spring bar tool to extract the horizontal pins from the lateral seats of the case. Insert the new strap by aligning the holes to the pin and reposition it with uniform pressure until it clicks into the opposite seats. Verify that the strap is securely fastened before wearing the watch.

Yes. Any strap with a 20 mm lug width is compatible. Choose manufacturers that guarantee dimensional precision (±0.2 mm), stitch quality and stability over time. Artisanal straps from selected tanneries offer greater quality control compared to industrial production.

An artisanal vegetable-tanned leather strap lasts 3-5 years with daily use, provided regular cleaning and periodic rotation with other straps. Alligator and shell cordovan have longer durability (5-8 years) thanks to their more resistant structure. The standard warranty is 18 months, covering manufacturing defects and critical stitching.