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“On The Fly” Extension Link - Micro Adjustment for Longines Spirit Models

Trusted by over 5,000 customers worldwide
Worldwide Insured Shipping Available

Model

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  • Spirit Zulu Time 39mm (Steel/Titanium)
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  • Spirit Zulu Time 42mm (Steel/Titanium)
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  • Spirit Pilot Flyback 39.5mm (Steel/Titanium)
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  • Spirit 40mm (3-hands) (Steel/Titanium)
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  • Spirit 42mm (3-hands) (Steel/Titanium)
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  • Spirit Flyback 42mm (Steel/Titanium)
   IN STOCK
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YOUR BRACELET IS NEVER THE PERFECT FIT

The Longines Zulu Time is easily one of the brand’s best releases in years — but it should have shipped with this feature. Add it, and it’s perfect.

Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.

On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.

  • Always Perfect – Comfort on demand, in seconds.

  • Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.

  • Luxury Craftsmanship – Same 316L stainless steel grade as Longines, with a flawless aesthetic match.

  • Easy 1-Minute Install – Use the supplied friction pin and a pin pusher tool; install once and adjust forever.

  • Reversible – Install once, remove anytime, no trace.

Once you try it, every other bracelet will feel wrong.

We offer reliable worldwide shipping, and orders are carefully processed and dispatched with tracking details provided. If for any reason you are not satisfied with your purchase, you may return it within 14 days of receipt, provided the item is unused, in its original packaging, and in resalable condition. Please note, we cannot accept returns for used items. Refunds or exchanges will be processed once the return has been received and inspected.

All Steel Reef products come with a comprehensive 3-year warranty, covering manufacturing defects in materials and craftsmanship under normal use. If an issue arises within this period, simply contact our team and we will repair or replace the item at no additional cost. This warranty reflects our commitment to quality and ensures peace of mind with every purchase.

Every Steel Reef component is precisely engineered and thoroughly inspected.

In the rare event of a manufacturing fault or a genuine fit issue, we’ll take care of it with a replacement.

Have questions about sizing, compatibility, or choosing the right accessory? Our team of specialists is here to help. Reach out anytime for personalized advice and expert guidance to ensure you select the perfect product for your timepiece.

“On The Fly” Extension Link - Micro Adjustment for Longines Spirit Models

Designed. Tested. Trusted.

5,000+ Customers worldwide

5,000+ Customers worldwide

Trusted by collectors across every continent. Owners who value authenticity choose Steel Reef. Proven upgrades, worn daily on thousands of wrists.

PRECISION MANUFACTURING

PRECISION MANUFACTURING

Cut, finished, and tolerance-tested. Every edge, curve, and click meets factory spec. Precision isn’t a claim - it’s our process.

WORLDWIDE SHIPPING

WORLDWIDE SHIPPING

We build what collectors ask for. Your insights shape our engineering roadmap. Every release solves a real wrist-level challenge.

COMMUNITY LED RESEARCH

COMMUNITY LED RESEARCH

We build what collectors ask for. Your insights shape our engineering roadmap. Every release solves a real wrist-level challenge.