Strap for Avigation Watch Type A-7

The lug width of the Longines Heritage L2.779.4.53.0 is 20 millimetres. This dimension represents the width between the lugs on the watch case and is the standard compatible with all our 20mm strap collection available on milanostraps.it.

For the Heritage chronograph, we recommend alligator in dark brown or gunmetal grey tones for formal elegance, or vegetable-tanned calf leather if you wish for natural patina development over time. For a sporty vintage aesthetic, a grey-blue or sand beige NATO strap emphasises the aviator DNA of the model.

Strap replacement requires a spring bar remover tool. Position your watch on a soft surface, locate the tiny lateral springs inside the lugs, and gently compress one end of the spring to slide out the old strap. Insert the new one, ensuring the spring clicks back into position with a light snap.

Yes, entirely. Any strap with a 20mm lug width is compatible with your Heritage. On milanostraps.it you'll find a comprehensive collection of artisanal straps in leather, fabric and rubber, all crafted to the correct width specification and ready to use.

A quality leather strap has an average lifespan of 3-5 years with daily wear, depending on the material (alligator and shell cordovan last longer than calf) and climatic conditions. A vegetable-tanned strap develops visible patina within 6-12 months, increasing aesthetic appeal over time. We recommend rotating with at least two different straps to extend longevity.