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Strap for IWC Pilot IW3777-09

The Pilot's Watch Chronograph Stainless Steel / Black / Strap takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

21mm
21 mm strapsAll IWC
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Lug width21 mm
Case diameter43 mm
ReferenceIW3777-09 (aka: 3777-09, IW377709)
FamilyPilot
MovementIWC caliber 79320 Hours, Minutes, Small seconds | Date, Day | Chronograph
Year2016 - 2022
CaseStainless Steel

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 21 mm · Ø 1.8 mm double flange · industry standard, no brand part number

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Pilot's Watch Chronograph Stainless Steel / Black / Strap — watch

Straps for the Pilot IW3777-09

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

What I'm asked about the IWC Pilot IW3777-09

What strap size does the IWC Pilot IW3777-09 take?

The IWC Pilot IW3777-09 needs 21 mm between the lugs, usually 18 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the IWC Pilot IW3777-09 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 Pilot IW3777-09?

Yes, in 21 mm leather. On a 43 mm chronograph I like box calf: it holds its shape and carries a substantial case.

Which strap do you recommend for the IWC Pilot IW3777-09?

A 21 mm box calf. You'll find it ready in the 21 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