Strap for Air-King 40

The Rolex Air-King 116900-0001 is fitted with a 20mm lug width. This measurement is crucial for selecting the correct strap: our filter system for <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-20mm">20mm straps</a> enables you to find all models compatible with this reference immediately.

The choice depends on your intended use: for formal elegance, we recommend <a href="/pages/termine-glossario/alligatore">alligator</a> or <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> in dark shades; for everyday sporty styling, calf leather with subtle grain texture or technical FKM rubber straps. The Air-King, being a modernised instrument watch, enhances both structured leathers and technical materials equally.

The strap is replaced via the spring bars located at 12 and 6 o'clock on the case. Remove the old strap by gently depressurising the spring bars, then insert the new one in the same manner. We recommend using a dedicated spring bar tool to avoid scratching the case. Should you prefer professional assistance, our Casati Milano atelier performs replacement by appointment.

Absolutely. A bespoke 20mm artisanal strap is perfectly compatible with the Air-King 116900-0001, provided it respects the correct <a href="/pages/termine-glossario/misura-ansa">lug width</a>. Our straps are crafted from noble leathers and hand-finished, guaranteeing superior build quality to many OEM offerings. The movement's COSC certification remains intact regardless of the strap fitted.

A high-quality <a href="/pages/termine-glossario/concia-vegetale">vegetable-tanned</a> strap typically lasts 3-5 years with daily wear, developing a fascinating patina over time. Shell cordovan reaches 5-7 years. Longevity depends on solar exposure, humidity, and maintenance. Our straps include an 18-month warranty against manufacturing defects; Casati Milano offers regeneration service to extend the life of your piece.