Strap for Chronomat 44 Stainless Steel / Sierra Silver Roman / Calf

The lug width of the Breitling Chronomat B01 44 AB011012.G676.435X is 22mm. This measurement is taken between the lower lugs of the case, at the point where the spring bar secures the strap. The lug geometry is straight, which ensures broad compatibility with aftermarket 22mm straps.

For the steel Chronomat B01 44 with a black dial, the most suitable options are a flat-belly alligator strap for formal occasions, a perforated rally-style calf leather strap for a sporting aesthetic, or a NATO nylon strap for everyday wear and travel. Vulcanised rubber is recommended for aquatic environments. The correct width is 22mm with straight lugs.

To replace the strap on the Chronomat B01 44, use a flat-tipped spring bar tool with a blade width of 1.0–1.2mm. The straight lugs are easily accessible; insert the tool into the dedicated slot on the side of the lug, compress the spring bar and slide the strap free. No case disassembly is required and the operation can be performed independently with the correct tool.

Yes. The Breitling Chronomat B01 44 AB011012.G676.435X features straight 22mm lugs, a highly common measurement that allows a wide selection of artisan aftermarket straps. MilanoStraps offers options in leather (alligator, calf, shell cordovan), NATO and rubber, all supplied with spring bars and fully compatible with the original case geometry.

The longevity of a leather strap depends on the quality of the hide and conditions of use. A high-quality vegetable-tanned alligator or calf strap, with standard care — avoiding prolonged exposure to moisture and direct perspiration — will typically last 3–5 years before requiring replacement. MilanoStraps straps carry an 18-month warranty against manufacturing defects.