Strap for Colt 36 Mariner Blue / Rubber / Pin

The Breitling Colt A7438911/C913/238S/A16S.1 features an 18mm lug width. This measurement should be confirmed with a digital calliper placed internally between the two lugs, perpendicular to the strap axis.

For the Colt 36mm, an alligator strap with Mississippiensis grain offers the best balance between formal refinement and the watch's instrumental character. Vegetable-tanned calfskin develops an authentic patina over time, whilst a ballistic NATO or rubber strap remains consistent with the Colt's operational DNA.

The strap can be removed using a flat-tip or forked spring bar tool, inserted into the lug slot to compress the spring bar. Place the watch face-down on a soft cloth and proceed carefully to avoid scratching the satin-finished steel case. The correct replacement width is 18mm.

Yes. Any standard 18mm strap with 1.5mm diameter spring bars is compatible with the Breitling Colt A7438911/C913/238S/A16S.1. Milanostraps.it offers a curated selection of handcrafted 18mm straps in various materials and finishes, verified for dimensional compatibility with Breitling lugs.

The lifespan of a leather strap depends on the material and frequency of use. A quality vegetable-tanned calfskin strap, with regular conditioning and rotation, can last 3–5 years whilst retaining its structure. Alligator and shell cordovan, owing to their dense fibre structure, tend to last considerably longer, developing a patina that enhances their aesthetic value over time.