Strap for Super AVI B04 Chronograph GMT 46 Mosquito Night Figher

The lug width of the Breitling AVI SB04451A1B1X1 is 24mm. This measurement is the internal distance between the two metal pins of the strap attachment seat. It is essential to verify using a calliper that your strap is constructed precisely for 24mm, as an undersized or oversized strap will result in incorrect fitment and potential damage to the leather fibres.

For a technical chronograph such as the AVI, the most recommended straps are: natural alligator in vegetable tanning for maximum elegance and patina development; fine-grained calf leather for daily versatility; robust NATO for those prioritising military functionality. Vegetable-tanned alligator represents the most sophisticated choice, as its regular texture dialogues visually with aviator dials and develops rich patina characteristics over time.

To change the strap, first remove the watch from your wrist. Use a spring bar tool to gently lift the lower metal pin from its seat. Extract the old strap and insert the new one, ensuring the pin clicks correctly into both seats. Verify that the strap is stable with no lateral movement. Straps with deployantes may require slightly greater pressure for final pin seating.

Yes, the Breitling AVI SB04451A1B1X1 is fully compatible with quality aftermarket straps constructed for the 24mm lug width. Milano Straps offers a selection of artisanal straps in alligator, calf, NATO and rubber, customisable for size, colour, passants and thread. Casati Milano atelier also creates bespoke straps with personal hide selection and finishing options.

The longevity of a leather strap depends upon daily wear, material quality and maintenance. A quality alligator or calf strap, worn daily, maintains functional and aesthetic integrity for 3-5 years. Patina develops gradually, creating visual character. Factors such as humidity, direct sunlight and water contact reduce durability. Milano Straps vegetable-tanned straps require occasional cleaning and conditioning every 12-18 months. Casati Milano's 18-month warranty covers manufacturing defects and premature wear.