IWC · Portugieser
Strap for IWC Portugieser IW3712-19
The Portuguese Chrono-Rattrapante Stainless Steel / Silver / Lisboa takes 17 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
What I'm asked about the IWC Portugieser IW3712-19
What strap size does the IWC Portugieser IW3712-19 take?
The IWC Portugieser IW3712-19 needs 17 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the IWC Portugieser IW3712-19 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the IWC Portugieser IW3712-19?
Yes, in 17 mm leather. On a 41 mm chronograph I like box calf: it holds its shape and carries a substantial case.
Which strap do you recommend for the IWC Portugieser IW3712-19?
A 17 mm box calf. I don't keep this size ready in the catalogue: I make it to measure. If you'd rather have something built on your wrist, the Casati atelier.
The Portugieser IW3712-19, seen from the bench
Frequently asked questions
Which strap is best for the Portugieser IW3712-19?
The best strap for the Portugieser IW3712-19 depends on use and personal preferences. Black alligator with beige stitching is the most elegant and classic choice, as the embossed texture perfectly complements the satin-finished steel case. Grained calf is a valid alternative for those preferring softness and color variety, while rubber straps are ideal for sports activities. Milano Straps offers all these options in 17mm, customizable according to your taste.
Which aftermarket straps are compatible with the Portugieser IW3712-19?
Any strap with a 17mm lug width is compatible with the Portugieser IW3712-19. Milano Straps offers a selection of artisanal 17mm straps in alligator, calf, NATO and rubber, all verified for compatibility with this IWC model. Customizable straps allow you to choose the material, color and stitching thread according to your preferences.
How long does a leather strap last on the Portugieser IW3712-19?
The lifespan of a leather strap depends on the material, use and care. A quality alligator or calf strap, worn daily, typically lasts 3-5 years before showing visible signs of wear. Artisanal straps from Milano Straps benefit from an 18-month warranty through the Casati Milano atelier. With proper maintenance (protection from excessive moisture and direct sunlight) and rotation with other straps, the lifespan can extend significantly.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
Bespoke straps for IWC, in the atelier or by video call: casatimilano.com