Longines Spirit Zulu Time · Ref. LONGINES SPIRIT ZULU TIME · 20mm lug · 42mm case
At a Glance
| # | Best For | Strap | Material | Thickness |
|---|---|---|---|---|
| 1 | Overall / First Purchase | Caramel Saffiano Stitchless Strap | Saffiano Calfskin | 2.2mm |
| 2 | Dressy / Formal | Glossy Lagoon Blue Crocodile Signature Strap | Crocodile | 4.5–2.2mm |
| 3 | Everyday / Casual | Black Nubuck Slim Strap | Nubuck Calfskin | 2.2mm |
| 4 | Minimalist / Refined | Green Shell Cordovan Slim Strap | Shell Cordovan | 2.2mm |
| 5 | Casual / Relaxed | Fauve Baranil Signature Strap | Baranil Calfskin | 4.5–2.2mm |
| 6 | Active / Sporty | Grey Waffle CTS Rubber Strap | FKM Rubber | 4.0–3.3mm |
| 7 | Comfort / Wildcard | Warm Grey Hook Strap [kollokium x Delugs] | Fabric | 1.3mm |
There is a reason the Longines Spirit Zulu Time (ref. LONGINES SPIRIT ZULU TIME) keeps showing up in conversations about the best watches in its class. The finishing and attention to detail speak for themselves. It wears its 20mm lug width elegantly, and that is where aftermarket straps come in.
The 42mm case with its ~14mm profile gives you just enough wrist presence to anchor different strap materials without the watch disappearing. Here are my 7 picks — and why each one works.
Quick Specs
| Case diameter | 42mm |
| Lug width | 20mm |
| Lug-to-lug | ~50mm |
| Case thickness | ~14mm |
| Water resistance | 100m |
| Crystal | |
| Case material | Stainless steel (brushed/polished) |
| Movement |
The 20mm lug width means your options are curated but well-covered. Already know what you're looking for? Browse all Longines Spirit Zulu Time-compatible straps on the Strap Finder →
1. Best Overall — Caramel Saffiano Stitchless Strap
There's a reason this is the number one pick — it just works.
The Caramel Saffiano Stitchless Strap uses saffiano leather — that signature cross-hatch embossed pattern you see on high-end bags and accessories. It is remarkably scratch-resistant and handles moisture better than most leathers, which makes it one of the most practical premium options you can put on a watch. At 2.2mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Longines Spirit Zulu Time is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 42mm case, the proportions stay balanced.
The kind of strap that earns a permanent spot in your rotation.
If this style appeals but you want a different tone:
- Black Saffiano Stitchless Strap
- Cream Saffiano Stitchless Strap
- Navy Saffiano Stitchless Strap
- Orange Saffiano Stitchless Strap
2. Best Dressy — Glossy Lagoon Blue Crocodile Signature Strap
There's dressy, and then there's refined. This strap lands squarely in refined territory.
The Glossy Lagoon Blue Crocodile Signature Strap is made from genuine crocodile leather with a distinctive scale pattern that no embossed leather can replicate. The texture adds visual depth and character that works equally well with a suit or a smart-casual outfit. At 4.5–2.2mm thick, it balances presence and wearability nicely.
The Longines Spirit Zulu Time's 42mm case is ideally proportioned for this strap. Whether you are wearing it casually or dressing it up, the combination feels intentional. It is the kind of pairing where both the watch and strap look better together than apart.
If this style appeals but you want a different tone:
- Glossy Caramel Crocodile Signature Strap
- Glossy Emerald Crocodile Signature Strap
- Glossy Taupe Brown Crocodile Signature Strap
- Glossy Grey Crocodile Signature Strap
3. Best Everyday — Black Nubuck Slim Strap
The strap you reach for without thinking — that's what an everyday pick should be.
The Black Nubuck Slim Strap is crafted from nubuck leather — soft, velvety to the touch, and comfortable from the first wear. No break-in period needed. The suede-like texture adds a casual warmth that takes the edge off a formal watch without losing sophistication. At 2.2mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Longines Spirit Zulu Time is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 42mm case, the proportions stay balanced.
The range goes deeper if you want to explore:
- Natural Nubuck Slim Strap
- Navy Nubuck Slim Strap
- Light Grey Nubuck Slim Strap
- Dark Brown Nubuck Slim Strap
4. Best Minimalist — Green Shell Cordovan Slim Strap
Strip away the unnecessary and what's left is pure design. That's this strap.
The Green Shell Cordovan Slim Strap is crafted from premium materials with careful attention to detail and construction quality. At 2.2mm thick, it balances presence and wearability nicely.
The Longines Spirit Zulu Time's 42mm case is ideally proportioned for this strap. Whether you are wearing it casually or dressing it up, the combination feels intentional. It is the kind of pairing where both the watch and strap look better together than apart.
Once you see it on the wrist, it just clicks.
The range goes deeper if you want to explore:
- Black Shell Cordovan Slim Strap
- Navy Shell Cordovan Slim Strap
- Cognac Shell Cordovan Slim Strap
- Natural Shell Cordovan Slim Strap
5. Best Casual — Fauve Baranil Signature Strap
For those days when the Longines Spirit Zulu Time comes out with jeans and a t-shirt.
The Fauve Baranil Signature Strap is crafted from premium materials with careful attention to detail and construction quality. At 4.5–2.2mm thick, it balances presence and wearability nicely.
On the Longines Spirit Zulu Time, this strap preserves the watch's go-anywhere character. The 42mm case at ~14mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
Other colours worth considering:
- Black Baranil Signature Strap
- Cobalt Baranil Signature Strap
- Cream Baranil Signature Strap
- Gold Baranil Signature Strap
6. Best Sporty — Grey Waffle CTS Rubber Strap
Sport straps need to perform — water resistance, comfort, durability. This checks every box.
The Grey Waffle CTS Rubber Strap is made from FKM rubber — a high-performance elastomer that resists chemicals, heat, and ageing. Unlike silicone, it does not attract dust or lint. Cut-to-size construction means you trim it to your exact wrist measurement — no leftover tail, no keepers. At 4.0–3.3mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Longines Spirit Zulu Time is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 42mm case, the proportions stay balanced.
The kind of strap that earns a permanent spot in your rotation.
If this style appeals but you want a different tone:
7. The Wildcard — Warm Grey Hook Strap [kollokium x Delugs]
![Warm Grey Hook Strap [kollokium x Delugs] on Longines Spirit Zulu Time](https://cdn.shopify.com/s/files/1/0054/9040/9585/files/20250919-A7405207.jpg?v=1761299094&width=800)
Every rotation needs a curveball. This is mine.
The Warm Grey Hook Strap [kollokium x Delugs] is crafted from premium materials with careful attention to detail and construction quality. At 1.3mm thick, it balances presence and wearability nicely.
![Warm Grey Hook Strap [kollokium x Delugs]](https://cdn.shopify.com/s/files/1/0054/9040/9585/files/Kollokium_straps_Warm_Grey_1.jpg?v=1761299094)
What makes this pairing work on the Longines Spirit Zulu Time is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 42mm case, the proportions stay balanced.
Worth a look in other colourways:
- Anthracite Hook Strap [kollokium x Delugs]
- Black Hook Strap [kollokium x Delugs]
- Khaki-Green Hook Strap [kollokium x Delugs]
- Orange Hook Strap [kollokium x Delugs]
A Note on Buckle Colour
Quick but important: always match your buckle to your case. The Longines Spirit Zulu Time's Stainless steel (brushed/polished) case calls for a silver (brushed or polished) buckle. All Delugs leather straps ship with a pin buckle and can be upgraded to a Spring Deployant Clasp for extra security and convenience. All Delugs straps come with quick-release spring bars pre-installed, so swapping straps takes seconds.
How to Change the Strap on Your Longines Spirit Zulu Time
Swapping straps on the Longines Spirit Zulu Time is one of the easiest upgrades you can make — and with Delugs straps, you don't even need a tool.
If your Longines Spirit Zulu Time came on a bracelet, you'll first need to remove it. The easiest way to do this at home is with a Bracelet Removal Tool, which lets you compress the spring bars without risking scratches to the lugs or caseback. Once the bracelet is off, you can slide your new Delugs strap straight in.
All Delugs straps come with quick-release spring bars already pre-installed, so changing straps is completely tool-free. Here's how:
- Prepare your workspace. Lay the watch face-down on a soft cloth or microfiber pad to protect the caseback from scratches.
- Release the spring bar. Locate the small lever on the quick-release spring bar. Pull it back with your fingernail or fingertip to compress the bar.
- Remove the strap. While holding the lever, angle the strap out from between the lugs. Repeat for the other side.
- Insert the new strap. Slide one end of the spring bar into the lug hole. Pull the lever on the quick-release spring bar knob, guide the entire spring bar into the opposite lug hole, and then release the knob. You should hear a small click when the spring bar extends and seats into the lug hole.
- Check the fit. Give the strap a gentle tug to make sure both spring bars are securely locked in. If there's any play, reseat the spring bar.
The entire process takes under a minute once you get the hang of it — no spring bar tool required. The Longines Spirit Zulu Time uses a standard 20mm lug width, and all Delugs straps in 20mm will fit perfectly.
Frequently Asked Questions
What is the lug width of the Longines LONGINES SPIRIT ZULU TIME?
The Longines LONGINES SPIRIT ZULU TIME has a 20mm lug width. While 20mm is less common than 20mm, there is still a strong selection of quality straps available. All Delugs straps are available in 20mm.
What is the reference number for the Longines Spirit Zulu Time?
The reference number for the Longines Spirit Zulu Time is LONGINES SPIRIT ZULU TIME. You can find this on the caseback of your watch or on the original paperwork. Knowing your reference number helps ensure you get the right lug width when ordering a strap.
Can I use a dressy leather strap on a Longines versatile watch?
The Spirit Zulu Time is one of the most versatile watches in the Longines lineup — it takes both dressy and casual straps equally well. That's part of what makes it such a rewarding watch for strap changes. Don't be afraid to experiment.
Do Delugs straps come with spring bars?
Yes — every Delugs strap comes with quick-release spring bars pre-installed. This means you can change straps by hand in seconds, without needing any tools. The quick-release mechanism uses a small lever that you pull with your fingertip to compress the spring bar.
What is the best strap material for the Longines Spirit Zulu Time?
The Spirit Zulu Time's versatile nature means it works with almost everything. Start with what matches your most common wearing occasion — rubber or sailcloth for active use, nubuck or waxy leather for everyday, and alligator or saffiano for dressier moments. The Strap Finder makes it easy to browse by material and style.
Does Longines use quick-release spring bars?
Most Longines watches use standard spring bars that require a tool to remove. All Delugs straps come with quick-release spring bars pre-installed, so once you make the switch, future changes are completely tool-free.
Where can I find straps compatible with the Longines LONGINES SPIRIT ZULU TIME?
The Longines Strap Finder shows every Delugs strap compatible with the LONGINES SPIRIT ZULU TIME, filtered by lug width and style. You can also use the general Strap Finder to browse by brand, collection, and material. If you need help choosing, our team is available 24/7 via live chat.
Finding Your Strap
The beauty of the Longines Spirit Zulu Time is that it rewards experimentation. A dressy alligator for the office, nubuck for the weekend — each strap brings out a different side of the watch.
Use the Longines Spirit Zulu Time Strap Finder to see every compatible strap in one place, filtered to your exact reference. Or if you'd rather explore by feel, the general Longines Strap Finder lets you browse the full lineup and find your match.
Not sure which strap is right for your specific Spirit Zulu Time? Our team is available 24/7 via live chat — drop us a message and we'll help you find the perfect match for your watch, wrist size, and style.
About Delugs
Founded in 2018 and headquartered in Singapore, Delugs is dedicated to elevating the experience of watch ownership through the simple yet powerful act of strap changing. We believe that straps are integral to how a timepiece is worn, perceived, and enjoyed. Our mission is to make strap changing a lifestyle — an everyday act of self-expression and versatility.
Delugs is an independent brand with a global community of clients, with a strong online presence and growing physical retail footprint. Our direct-to-consumer focus keeps us closely connected with the watch enthusiast community — fostering conversations, hosting events, and helping shape a more inclusive and expressive culture around watch collecting. We also work closely with watch brands to craft straps that complement their timepieces, bridging the gap between brand and collector, form and function.
Our catalogue spans leather, rubber, and fabric straps, with options for every watch and every occasion. We are committed to craftsmanship and quality, product design and innovation, and outstanding customer service. We offer watch owners the freedom to change straps as easily as changing outfits, and the opportunity to engage more deeply with the watches they love.
Visit our flagship boutique at Raffles Hotel, Singapore →
— Marcus
![Anthracite Hook Strap [kollokium x Delugs] - Image 2](http://delugs.com/cdn/shop/files/20250919-A7405309_298x298_crop_center.jpg?v=1761299094)
![Delugs Anthracite Hook Strap [kollokium x Delugs] Fabric Watch Strap](http://delugs.com/cdn/shop/files/Kollokium_straps_Anthracite_1_298x298_crop_center.jpg?v=1761299094)
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