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Longines · Conquest

Strap for Longines Conquest 3.430.4.90.9

The Conquest 34 Sylt Edition takes 17 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

17mm
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Lug width17 mm
Case diameter34 mm
Reference3.430.4.90.9
FamilyConquest
MovementLongines caliber L888.5 Hours, Minutes, Seconds | Date | Chronometer
Year2025
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 17 mm · Ø 1.8 mm double flange · industry standard, no brand part number

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Conquest 34 Sylt Edition — watch

What I'm asked about the Longines Conquest 3.430.4.90.9

What strap size does the Longines Conquest 3.430.4.90.9 take?

The Longines Conquest 3.430.4.90.9 needs 17 mm between the lugs. It's the size I've been fitting on it for years.

Can the strap on the Longines Conquest 3.430.4.90.9 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 Longines Conquest 3.430.4.90.9?

Yes, in 17 mm leather. On a 34 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the Longines Conquest 3.430.4.90.9?

A 17 mm calf strap, for every day. 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.

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

The atelier's website: casatimilano.com

Updated on · by Antonio Zichichi