Strap for Avenger II GMT Stainless Steel / Stratus Silver / Calf / Pin

The lug width of the Breitling Avenger A3239011/G778/437X/A20BA.1 is 22mm. This measurement refers to the internal gap between the lugs where the strap is fitted. For an accurate replacement, always measure directly on the case using a digital calliper rather than relying on the width of the original strap.

For this Avenger, the most fitting options are: matt alligator leather in black or tobacco brown for a sport-luxury pairing, vegetable-tanned calfskin in a military finish with contrast stitching for those who favour an operational aesthetic, nylon NATO straps for heavy-duty use, and vulcanised rubber for aquatic environments. A brushed steel deployant clasp is the recommended closure for leather straps.

To replace the strap on the Avenger, use a springbar tool — preferably with a forked tip — inserted between the lug and the strap to compress the retaining spring bar. Exercise care to avoid scratching the stainless steel case. The correct springbar diameter for this model is compatible with 22mm lugs. If in doubt, consult a watchmaker or the Casati Milano atelier.

Yes: any strap with a 22mm attachment is technically compatible with the Breitling Avenger A3239011/G778/437X/A20BA.1. Milano Straps offers a selection of handcrafted straps in various leathers and materials, made by hand in Italy, with quality comparable to or exceeding the original strap. The 22mm collection is available directly on the website.

The lifespan of a leather strap depends on hide quality, tanning method and usage habits. A quality vegetable-tanned calfskin strap, with regular maintenance (conditioning cream every 2–3 months, kept away from heat sources), can last between 3 and 6 years. Shell cordovan, owing to its dense and resilient structure, offers superior longevity. Alligator leather, when properly cared for, retains its structural integrity and finish for 4–7 years. Milano Straps watchbands carry an 18-month warranty against manufacturing defects.