Strap for Heritage Chrono Black / Fabric

The lug width of the Tudor Heritage Chrono 70330N-0003 is 22mm. This dimension represents the distance between the interstices of the two lugs—the small eyelet metal attachments positioned at 12 and 6 o'clock on the case. Any strap compatible with 22mm will fit this model perfectly without requiring any modification.

Given the sporting and technical character of the Tudor Heritage Chrono, we recommend textured alligator with pronounced grain (motorsport texture), satin-finish calf leather in brown or grey tones, or NATO canvas for maximum versatility. If you desire natural aging over time, vegetable-tanned leather from Tuscan tanneries is the premium choice, developing authentic patina over years of wear.

The replacement is performed using specialised tools: employ a spring bar tool (small curved screwdriver) to compress the internal elastic ferrule of the lug, release tension and gently slide the existing strap out of its seat. The new strap enters via the same reverse path. If uncertain, the Casati Milano atelier offers strap-change service by appointment in Milan.

All straps with a 22mm lug width are compatible with the 70330N-0003. On milanostraps.it you will find a curated selection of 22mm straps in various materials—alligator, vegetable-tanned calf, shell cordovan, NATO, rubber—ready for shipment and customisable in length, initials and stitching style.

A quality vegetable-tanned leather strap typically lasts 3–5 years with daily wear, provided it is exposed to sunlight only during daylight hours and protected from excessive humidity at night. The tannin tends to dry over time; occasionally applying a light treatment with beeswax or leather balm maintains elasticity and extends useful life. Alligator or shell cordovan straps, thanks to their denser structure, can extend longevity to 7–10 years with proper maintenance.