Strap for Hornet World Timer

The lug width of the 1H6AS.B05A.C79F model is 20mm. This measurement must be taken between the two lugs from the outer part of the case, excluding any pre-existing bracelet. We recommend using a digital calliper for maximum precision, as the case's integrated structure requires extremely tight tolerances. To verify that your strap is compatible, contact the Casati Milano atelier for technical consultation.

The best strap depends on intended use. For formal or elegant daily wear, we recommend alligator with vegetable tanning in dark brown or grey ardoise calf: these materials enhance the subtlety of the steel case and movement complexity. For sporting or recreational activities, a Navy blue NATO in reinforced Cordura is ideal. For underwater or extreme environment use, FKM rubber guarantees dimensional stability and prolonged resistance. Your choice should respect both the case's aesthetic and your usage requirements.

To change the strap safely, remove the watch from your wrist and place it on a soft, flat surface. Use a dedicated spring bar tool to gently push the internal spring mechanism of the bar while extracting it from the lugs. Repeat on the other lug. Insert the new strap by aligning the side holes with the lugs and carefully reinsert the bar, verifying that it is firmly secured on both sides. If you lack experience, the Casati Milano atelier offers strap-change services by appointment.

Yes, any strap with a 20mm lug width is theoretically compatible. However, because the Arnold & Son case features an integrated structure with precise proportions, we recommend selecting straps that respect the thickness and profile of the original bar, avoiding excessively bulky materials at the shoulders. Milano Straps' straps are specifically selected and tested for watches of this calibre. For guaranteed compatibility, consult the Casati Milano atelier before purchase.

A high-quality leather strap (alligator or vegetable-tanned calf) has an average lifespan of 3–5 years with moderate daily use and regular maintenance. Alligator tends to last longer than calf due to its more robust structure. FKM rubber lasts 5–7 years. To extend the strap's life, avoid prolonged exposure to salt water and aggressive detergents, occasionally apply a leather conditioner, and rotate straps if you own multiple variants. The Casati Milano atelier offers restoration and leather regeneration services.