Strap for Top Time B31 Stainless Steel / Blue

The Breitling Top Time AB3113A71C1X1 has a lug width of 20 mm. This measurement is taken internally between the two case lugs using a calliper or a millimetre ruler. It is one of the most common lug widths in watchmaking, ensuring a wide availability of compatible straps.

For the Top Time AB3113A71C1X1, the most coherent choice for its vintage aesthetic is a vegetable-tanned calf leather strap with a smooth grain, in cognac, tobacco or dark brown tones. For formal occasions, an alligator strap with central-cut scales is the most refined option. For sport or daily wear, a nylon NATO or a rubber strap with a racing texture are both functional and stylistically appropriate.

To replace the strap, use a spring bar tool — a bifurcated pin lever — inserted into the groove between the strap and the lug, compressing the spring bar until it releases. No case disassembly or watchmaker's intervention is required, though care should be taken to avoid scratching the steel finish. The new 20 mm strap is fitted by reseating the spring bars into the lug holes.

Yes. Any strap with a 20 mm attachment width is technically compatible with the Top Time AB3113A71C1X1. On milanostraps.it, aftermarket straps in artisan leather, NATO and rubber are available, selected for geometric compatibility with Breitling lugs. For a fully bespoke solution, the Casati Milano atelier crafts made-to-measure straps with a choice of leather, stitching and buckle.

The lifespan of a leather strap depends on the quality of the tanning, frequency of use, and exposure to perspiration and moisture. A high-quality vegetable-tanned calf strap, with moderate daily wear, typically lasts between 18 and 36 months before showing structural deterioration. Shell cordovan often exceeds three years due to the density of its fibres. Proper care — drying after water exposure and occasional treatment with leather cream — significantly extends strap life.