Strap for Portuguese Chrono-Automatic Boris Becker

The lug width (distance between the two lateral lugs) of the IWC Portugieser IW3714-30 is 20.00 mm. This measurement is essential for selecting a compatible strap. You can verify it by measuring directly between the lugs or consulting the original IWC documentation.

For the classical character and satin-finished case of the IW3714-30, alligator leather, vegetable-tanned calf leather, or shell cordovan are strongly recommended. Alligator is the canonical choice, with its natural geometric grain reflecting the technical precision of the case. Cordovan, whilst requiring more attention, develops remarkable patina and lustre over time. Avoid bright or overly casual materials (rubber, nylon) that contradict the understated identity of the model.

Strap replacement is accomplished using a spring bar remover tool, available from jewellers and specialist retailers. Position the tool's tip in the small lateral hole on the case lug to release the internal spring; the strap will detach. For installation, align the new strap's holes with the case lugs, compress slightly to insert the spring, and verify secure anchorage. Alternatively, the service can be performed by a certified watchmaker.

Yes, provided the lug width is 20 mm. High-quality artisanal aftermarket straps (such as those offered by MilanoStraps) often provide personalisation levels and material quality comparable to or exceeding original IWC straps. Ensure the supplier is reputable, the leather thickness proportional to the case, and the attachment system (spring bar) robust and precise.

A high-quality leather strap with vegetable tanning and artisanal craftsmanship typically lasts 3–5 years with daily wear, varying with climate, humidity and frequency of use. Shell cordovan, owing to its natural density, can exceed 7 years. The patina that develops is not deterioration but noble ageing; micro-creasing and colour shift are authentic signs of maturation. With regular maintenance (gentle cleaning, drying after rain, conditioning with natural wax every 12–18 months), lifespan extends significantly.