Strap for Colt Quartz Mariner Blue / Calf

The lug width of the Breitling Colt A7438811/C907/433X/A20BA.1 is 22mm. This is the internal measurement between the two lugs of the case, which determines compatibility with any aftermarket strap.

For a 44mm stainless steel Breitling Colt, the most suitable straps are: vegetable-tanned calfskin for everyday wear with gradual patina development, alligator for formal settings, vulcanised rubber for sporting use, and ballistic nylon NATO for maximum practicality. The choice depends on context and personal style.

To replace the strap, you will need a fine-tipped spring bar tool. Insert the tip into the slot of the spring bar located inside the lug, compress the spring bar, and slide the strap free. Proceed carefully to avoid scratching the case. It is advisable to rest the watch on a soft cloth and work in good light.

Yes. Any strap with a 22mm lug width is compatible with the Breitling Colt A7438811/C907/433X/A20BA.1. Milanostraps.it offers a selection of Italian handcrafted straps in various materials — leather, rubber, NATO — all manufactured to precise tolerances for a correct fit.

The lifespan of a leather strap depends on the type of leather, frequency of use, and exposure to perspiration and moisture. A quality vegetable-tanned calfskin strap, with regular conditioning every 2–3 months, typically lasts between 2 and 4 years. Alligator, owing to its denser fibre structure, can exceed 5 years with careful use. Straps produced by Casati Milano carry an 18-month warranty against manufacturing defects.