Strap for Aquaracer 300M Quartz 32 Stainless Steel / Green - Diamond / Bracelet

The lug width of the TAG Heuer Aquaracer WBD1316.BA0740 is 20 millimetres. This measurement represents the internal distance between the two lugs of the case and must be measured precisely to ensure compatibility with any aftermarket strap. An incorrectly sized strap would result in either loosening or insertion difficulties on the steel lugs.

For the WBD1316.BA0740, an alligator strap represents the most stylistically coherent choice: the natural scale pattern harmonises perfectly with the techno-sport aesthetic of the case, whilst the flexibility of the leather ensures comfort. Alternatively, vegetable-tanned calf leather develops character over time, becoming a daily companion. For water-based activities, natural rubber or technical NATO straps offer practicality without aesthetic compromise.

To change the strap on the WBD1316.BA0740, you must remove the spring bars positioned inside the lugs. Using a dedicated spring bar tool or small steel lever, apply gentle downward pressure to free the bar. Once extracted, the original strap slides away easily. The new 20mm strap is positioned by aligning the holes with the lugs, then the spring bars are reintroduced with a fluid motion until fully seated.

Any strap specifically designed for 20mm lug width is compatible with the WBD1316.BA0740. It is important to verify that the strap thickness does not exceed 4.5 millimetres to ensure smooth insertion into the lugs. Milano Straps offers a dedicated collection of artisan straps in various leathers: alligator, calf, shell cordovan, with customisation options in sizes, colours and finishes.

The lifespan of a natural leather strap varies depending on frequency of wear, exposure to environmental factors, and tanning method. A quality artisan alligator or calf, worn daily, develops visible patina after 6–12 months and maintains structural functionality for 3–5 years. Shell cordovan, owing to its inherent rigidity, can last beyond 7 years with regular wear. Prolonged exposure to moisture, chlorine and salt water accelerates ageing. The 18-month warranty offered by Casati Milano covers manufacturing defects and provides technical support for maintenance and restoration.