Strap for Portuguese Chrono-Automatic Stainless Steel / Blue

The lug width (or lug size) of the Portugieser IW3714-91 is 20 mm, measured internally between the watch case spring bars. This specific dimension is integral to the model's proportional design and ensures proper compatibility with aftermarket straps.

We recommend alligator leather with structured grain (bold, maritime character), vegetable-tanned calf (natural patina development over time), or shell cordovan (structural rigidity and deep colour depth). Material choice reflects usage: formal, daily, or sports-oriented.

To change the strap, use a spring bar tool to push out the metal pins (spring bars) connecting the case to the existing strap. Once removed, insert the new 20 mm strap by aligning and pushing the pins until they click into place. Proceed carefully to avoid damaging the case lugs.

Yes, any high-quality 20 mm strap is compatible with the Portugieser IW3714-91, provided the spring bar holes are correctly aligned. We recommend bespoke artisanal straps offering customisation in leather, stitching colour, and measurements.

A quality leather strap, constructed from vegetable-tanned or alligator leather, typically lasts 3–5 years with daily wear. Longevity depends on sun exposure, perspiration, and maintenance. Shell cordovan and vulcanised rubber straps offer extended lifespans.