Strap for Tourbillon Skeleton Earth

The lug width of the Armin Strom Skeleton ST15-TE.90 is 20mm. This measurement represents the distance between the two lateral lugs of the case and determines strap compatibility. Any strap designed for this model must have a width of 20mm to ensure a perfect fit into the case's standard lugs.

The choice of strap depends on the context of use and personal aesthetic preferences. For formal occasions, a dark brown alligator or vegetable-tanned leather strap is recommended, as these enhance the sophistication of the skeletonised movement. For a more dynamic approach, an FKM rubber strap or a heavy cotton NATO offers everyday functionality. The proportion between the case diameter (43.40mm) and lug width (20mm) allows elegant pairings without compromising visual balance.

The strap is changed using a spring bar tool (bayonet-style lug removal tool), a specific watchmaking instrument. Carefully place the watch on a soft surface, insert the tool tip into the groove positioned laterally to the lug, lift gently to compress the spring, and extract the lug from the case. The reverse procedure allows insertion of the new strap. This operation should be performed with care to avoid damaging the case's finishing.

Yes, any strap with a 20mm lug width is compatible with the ST15-TE.90, provided the construction quality is consistent with the timepiece. Handcrafted straps in full-grain leather, featuring hand-sewn finishing or natural wear patterns, maintain the refined aesthetics of the watch. It is important to verify that the strap is free from surface defects and that the keepers (side holes for lug insertion) are perfectly aligned.

The lifespan of a leather strap depends on the material quality and intensity of use. A high-quality calf or alligator strap can last 3-5 years with moderate daily wear. Leather exposed to constant humidity or repeated mechanical stress ages more rapidly. Vegetable-tanned leather straps develop a natural patina, while aniline leather straps may require periodic conservation treatments. Timely replacement prevents damage to the case.