Strap for Chronomat 44 GMT Stainless Steel / Onyx Black / Bracelet

The lug width of the Breitling Chronomat B01 44 AB042011.BB56.375A is 22 mm. This measurement refers to the internal distance between the two lugs at the point where the strap attaches to the case. It is a consistent specification across the entire Chronomat B01 44 44 mm range.

The most suitable materials for the Chronomat B01 44 are vegetable-tanned calf leather for elegant daily wear, bombé alligator for formal occasions, vulcanised rubber for sporting or marine environments, and ballistic nylon NATO for maximum practicality. All options should feature a 22 mm lug width and, ideally, a stainless steel buckle or deployant clasp to complement the case finish.

To replace the strap, you will need a fine-tipped springbar tool. Insert the tool into the gap between the lug and the strap, compress the springbar, and slide the strap free. Take care not to scratch the steel lugs — rest the case on a soft cloth and work in good light. The new 22 mm strap is fitted by compressing the springbars and seating them in the lug holes.

Yes, the aftermarket offers a wide selection of straps compatible with the 22 mm lug width of the Chronomat B01 44. Milano Straps produces handcrafted leather, rubber, and nylon straps specifically dimensioned for this model, with tapered ends designed to fit the geometry of Breitling lugs. It is advisable to confirm whether the strap end should be straight or slightly curved to suit your particular case variant.

The lifespan of a leather strap depends on the quality of the tanning process, maintenance, and frequency of use. A high-quality vegetable-tanned calf strap, rotated with other straps and treated periodically with leather conditioner, can last between three and five years whilst developing a distinguished patina. Alligator, being denser and more compact, tends to last longer when kept away from excessive moisture. Constant use in humid or sporting environments significantly reduces longevity — in such cases, rubber or NATO straps are recommended.