Strap for Spirit Automatic 40 Silver / Strap

The lug width is 21mm. This specific measurement distinguishes it from standard 20mm widths and is essential to ensure optimal proportions between case and strap. To verify, measure the distance between the lugs with a ruler.

Dark brown alligator is the most balanced choice for this aviatory timepiece, as it amplifies the sobriety of the satin black dial. Shell cordovan represents an equally durable alternative, whilst a ballistic nylon NATO emphasises the watch's functional purpose.

The change requires a dedicated tool (spring bar tool) to remove the elastic pins securing the strap to the lugs. Position the tool in the small lateral grooves, press downward to release the pin, then extract the previous strap and insert the new one, ensuring the pins are firmly seated.

Yes, provided they respect the 21mm lug width. Many high-quality straps, such as alligator with vegetable tanning or shell cordovan, are specifically designed for this width and guarantee complete compatibility whilst maintaining the original aesthetic.

Durability depends on material and usage patterns. A vegetable-tanned alligator lasts approximately 18–24 months; shell cordovan exceeds 3 years owing to its intrinsic density. Leather wears through natural friction and perspiration exposure; proper maintenance and rotation with alternative straps significantly extends longevity.