Milano Straps
← IWC

ITENDEFRES

SearchCart
Menu

IWC · Portofino

Strap for IWC Portofino IW3550-01

The Portofino Automatic Moonphase / Yellow Gold / White / Strap takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

18mm
18 mm strapsAll IWC
Not sure about the right strap, or can't find your watch?Message me on WhatsApp
Lug width18 mm
Case diameter34 mm
ReferenceIW3550-01 (aka: IW355001)
FamilyPortofino
MovementIWC caliber 3755 Hours, Minutes, Seconds | Date | Moonphase
Year1984 - 1986
CaseYellow Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Standard spring bar · length 18 mm · Ø 1.8 mm double flange · industry standard, no brand part number

View →
Portofino Automatic Moonphase / Yellow Gold / White / Strap — watch

Your watch with our straps

Portofino IW3550-01 with Brown Italian Leather Strap
Portofino IW3550-01 with Black Calfskin Rally Watch Strap – Handmade in Milan
Portofino IW3550-01 with Black Saffiano Strap Ecru Stitching
Portofino IW3550-01 with Swift Red Leather Strap
Portofino IW3550-01 with Vintage Brown Calfskin Strap — Natural Patina
Portofino IW3550-01 with Swift Topo Leather Strap
Portofino IW3550-01 with Black and White Driver Leather Strap
Portofino IW3550-01 with Hammered calfskin strap in cuoio
Portofino IW3550-01 with Saffiano Leather Strap Brown — Tone-on-Tone Stitching
Portofino IW3550-01 with Hammered Calfskin Strap Light Blue
Portofino IW3550-01 with Saffiano Red Strap Ecru Stitching
Portofino IW3550-01 with Pink Ostrich Strap
Portofino IW3550-01 with Hammered Yellow Strap with Ecru Stitching
Portofino IW3550-01 with Grey Hammered Leather Strap with Ecru Stitching
Portofino IW3550-01 with Saffiano Taupe Strap
Portofino IW3550-01 with Distressed Vintage Leather Strap Double Stitching
Portofino IW3550-01 with Hammered Pink Strap with Ecru Stitching
Portofino IW3550-01 with Black and Red Driver Strap
Portofino IW3550-01 with Black and Blue Leather Driver Strap
Portofino IW3550-01 with Cognac Mohawk Leather Strap
Portofino IW3550-01 with Black and Yellow Driver Leather Strap
Portofino IW3550-01 with Hammered Black Calfskin Strap — Ecru Stitching
Portofino IW3550-01 with Vintage Black Calfskin Leather Strap
Portofino IW3550-01 with Saffiano Navy Blue Strap
Portofino IW3550-01 with Saffiano Leather Strap Light Blue Ecru Stitching
Portofino IW3550-01 with Hammered Calfskin Watch Strap Green with Ecru Stitching
Portofino IW3550-01 with Saffiano Cognac Strap
Portofino IW3550-01 with Saffiano Green Strap
Portofino IW3550-01 with Swift Leather Strap Olive Green
Portofino IW3550-01 with Dark Brown Saffiano Strap with Ecru Stitching
Portofino IW3550-01 with Saffiano Black Strap Tone Stitching
Portofino IW3550-01 with Matte Grey Alligator Strap
Portofino IW3550-01 with Gray Ostrich Strap
Portofino IW3550-01 with Italian Calfskin Rally Strap in Cognac
Portofino IW3550-01 with Matte Blue Alligator Strap
Portofino IW3550-01 with Millennium Green Alligator Strap
Portofino IW3550-01 with Matte Black Alligator Strap
Portofino IW3550-01 with Matte Black Alligator Strap — Minimal Stitching
Portofino IW3550-01 with Matte Dark Brown Alligator Strap
Portofino IW3550-01 with Vintage Olive Green Calf Leather Watch Strap
Portofino IW3550-01 with Matte Dark Gray Alligator Strap
Portofino IW3550-01 with Millennium Green Alligator Strap — Minimal Stitching
Portofino IW3550-01 with Millenium Cognac Alligator Strap

Calf, Brown

Brown Italian Leather Strap

€80

See the strapAll 18 mm straps

1 / 43

Real photos of the strap and the case. No generated images.

What I'm asked about the IWC Portofino IW3550-01

What strap size does the IWC Portofino IW3550-01 take?

The IWC Portofino IW3550-01 needs 18 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the IWC Portofino IW3550-01 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 Portofino IW3550-01?

Yes, in 18 mm leather. On a 34 mm dress watch alligator is the natural choice: thin, elegant, what it was born for.

Which strap do you recommend for the IWC Portofino IW3550-01?

A thin 18 mm alligator. You'll find it ready in the 18 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

For changing the strap

Classic Strap and Bracelet Removal Tooltwo-tip spring bar tool→Milano Straps Premium Swiss Standard Watch Bucklestang buckle, steel or PVD→Leather Conditioner Milano Strapsnourishes and protects the strap→Casati Milano Rectangular Epsom Leather Travel Case — Brownfor the watch and spare straps→

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