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IWC · Big Pilot

Strap for IWC Big Pilot IW5104-01

The Big Pilot Heritage 55 takes 26 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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  • Ships in 1–3 working days
  • Worldwide shipping
  • 30-day returns
  • 12-month warranty on manufacturing defects
  • Hand-stitched in Milan

Lug width

26mm
26 mm strapsAll IWC
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Lug width26 mm
Case diameter55 mm
ReferenceIW5104-01 (aka: 5104-01, IW510401)
FamilyBig Pilot
MovementIWC caliber 98300 Hours, Minutes, Small seconds
Year2016
CaseTitanium

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 26 mm · Ø 1.8 mm double flange

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Big Pilot Heritage 55 — watch

What length do I need?

Measure your wrist with a tailor's tape or a piece of string, comfortably snug.

Wrist circumferenceLength (long side / short side)
15.0–16.4 cm120 / 70 mm
16.5–17.8 cm125 / 75 mm
17.9–19.0 cm130 / 80 mm
19.1–20.3 cm135 / 85 mm
20.4–21.6 cm140 / 85 mm
21.7–22.9 cm145 / 90 mm

The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.

What I'm asked about the IWC Big Pilot IW5104-01

What strap size does the IWC Big Pilot IW5104-01 take?

The IWC Big Pilot IW5104-01 needs 26 mm between the lugs. It's the size I've been fitting on it for years.

Can the strap on the IWC Big Pilot IW5104-01 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 Big Pilot IW5104-01?

Yes, in 26 mm leather. On a 55 mm dress watch alligator is the natural choice: thin, elegant, what it was born for.

Which strap do you recommend for the IWC Big Pilot IW5104-01?

A thin 26 mm alligator. You'll find it ready in the 26 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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only

Bespoke straps for IWC, in the atelier or by video call: casatimilano.com

Updated on · by Antonio Zichichi