Strap for Formula 1 Quartz 35 Stainless Steel / Silver - Diamond / Bracelet

The lug width of the TAG Heuer Formula 1 WBJ1315.BA0666 is 20 millimetres. This specification is unique to this reference and demands straps with precisely calibrated lugs. Correct measurement is verified using a digital calliper, measuring the internal distance between the fixed lugs on the case. Even a deviation of half a millimetre can compromise compatibility.

For the WBJ1315.BA0666, alligator represents the most elegant and versatile choice: irregular grain, natural colours (black, dark brown) that dialogue with the brushed steel case. Vegetable-tanned calf leather offers substance and patina development over time. Shell cordovan ensures superior longevity, whilst rubber and technical fabric are ideal for sporty or summer contexts. The choice depends on intended use and personal colour preferences.

Replacing the strap on the WBJ1315.BA0666 requires a spring bar tool. Insert the tool underneath the fixed lug, pressing gently to retract the spring and release the original strap. Do not force to avoid case damage. Once removed, position the new 20mm strap and reinsert the spring bar, verifying it is securely seated on both sides. This operation is recommended via an expert if unfamiliar with the procedure.

Yes, aftermarket straps are compatible if they respect the 20-millimetre lug width specification. Milano Straps offers an extensive range of artisanal 20mm straps, verified in laboratory to guarantee perfect fit and compatibility with the WBJ1315.BA0666. We advise against purchases from unqualified sources, as the risk of incompatibility is considerable and could damage the case lugs.

The lifespan of a leather strap depends on material quality and usage intensity. Alligator and calf, if maintained regularly, last 3-5 years under normal conditions. Shell cordovan, thanks to the fibre structure of horse leather, can exceed 8 years. Exposure to sweat, humidity and sunlight accelerates wear. Casati Milano guarantees 18 months on bespoke-made straps, with the possibility of partial element replacement without complete strap renewal.