Longines Spirit 37mm · 18mm lug
At a Glance
| # | Best For | Strap | Material | Price |
|---|---|---|---|---|
| 1 | Overall / First Purchase | Dark Brown Saffiano Stitchless Strap | Saffiano Calfskin | $110 |
| 2 | Dressy / Formal | Matte White Alligator Signature Strap | Alligator | $205 |
| 3 | Everyday / Casual | Navy Pueblo Slim Strap | Pueblo Calfskin | $110 |
| 4 | Minimalist / Refined | Black Shell Cordovan Slim Strap | Shell Cordovan | $165 |
| 5 | Casual / Relaxed | Navy Rubberised Leather (Togo) Signature Strap | Togo Leather (Rubberised) | $110 |
| 6 | Active / Sporty | Navy Tropical CTS Rubber Strap | FKM Rubber (Tropical) | $145 |
| 7 | Comfort / Wildcard | Natural Babele Slim Strap | Babele Calfskin | $110 |
✓ No import fees — delivered duty-free✓ Lifetime warranty✓ Ships globally from USA, UK & Singapore
The Longines Spirit 37mm is one of those watches that makes you stop and look — and then look again. The finishing and attention to detail speak for themselves. At 18mm lug width, it is an incredibly versatile canvas for strap changes.
The case with its 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.
The 18mm lug width means your options are curated but well-covered. Already know what you're looking for? Browse all Longines Spirit 37mm-compatible straps on the Strap Finder →
Swipe to browse all 7 picks →
1. Best Overall — Dark Brown Saffiano Stitchless Strap
If you're buying your first strap for the Longines Spirit 37mm, this is where I'd start.
The Dark Brown 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.
On the Longines Spirit 37mm, this strap preserves the watch's go-anywhere character. The case pairs naturally with the padded construction without creating any imbalance on the wrist.
Simple, effective, and genuinely enjoyable to wear.
Alternatives in the same family:
- Black Saffiano Stitchless Strap
- Caramel Saffiano Stitchless Strap
- Cream Saffiano Stitchless Strap
- Navy Saffiano Stitchless Strap
2. Best Dressy — Matte White Alligator Signature Strap
The Longines Spirit 37mm cleans up remarkably well — and this strap is the reason.
The Matte White Alligator Signature Strap is crafted from genuine alligator leather — not embossed calfskin, the real thing. Each scale pattern is unique, and the matte finish gives it a refined presence that catches light without being flashy. The leather is supple from the start with minimal break-in needed. At 4.5–2.2mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Longines Spirit 37mm is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a case, the proportions stay balanced.
The range goes deeper if you want to explore:
- Matte Black Alligator Signature Strap
- Matte Navy Alligator Signature Strap
- Matte Himalayan Alligator Signature Strap
- Matte Mahogany Alligator Signature Strap
3. Best Everyday — Navy Pueblo Slim Strap
The strap you reach for without thinking — that's what an everyday pick should be.
The Navy Pueblo Slim Strap features Buttero leather from the Walpier tannery in Italy. This vegetable-tanned leather develops one of the most beautiful patinas in watchmaking — scratches blend into the surface and the colour deepens over time. If you enjoy watching your strap age gracefully, this is the one. At 2.2mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Longines Spirit 37mm is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a case, the proportions stay balanced.
A combination that's greater than the sum of its parts.
Worth a look in other colourways:
- Grigio Pueblo Slim Strap
- Dark Brown Pueblo Slim Strap
- Natural Pueblo Slim Strap
- Cognac Pueblo Slim Strap
4. Best Minimalist — Black Shell Cordovan Slim Strap
Strip away the unnecessary and what's left is pure design. That's this strap.
The Black 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 37mm's 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.
The range goes deeper if you want to explore:
- Navy Shell Cordovan Slim Strap
- Cognac Shell Cordovan Slim Strap
- Natural Shell Cordovan Slim Strap
- Green Shell Cordovan Slim Strap
5. Best Casual — Navy Rubberised Leather (Togo) Signature Strap
Casual doesn't mean careless — this strap adds character without trying too hard.
The Navy Rubberised Leather (Togo) Signature Strap uses rubberised leather — a material that blends the look and feel of leather with the water resistance and durability of rubber. The smooth finish is clean and modern, and the pastel colour options add a playful element to otherwise serious watches. At 4.5–2.2mm thick, it balances presence and wearability nicely.
Paired with the Longines Spirit 37mm's distinctive dial, this strap adds a layer of personality that the factory option does not offer. The case thickness means a padded strap like this one feels proportional and substantial.
The kind of strap that earns a permanent spot in your rotation.
If this style appeals but you want a different tone:
- Black Rubberised Leather (Togo) Signature Strap
- Colibri Rubberised Leather (Togo) Signature Strap
- Hunter Green Rubberised Leather (Togo) Signature Strap
- Taupe Rubberised Leather (Togo) Signature Strap
6. Best Sporty — Navy Tropical CTS Rubber Strap
Not every sporty strap needs to be water-resistant — sometimes it is about the texture and attitude.
The Navy Tropical 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.
Paired with the Longines Spirit 37mm's distinctive dial, this strap adds a layer of personality that the factory option does not offer. The case thickness means a padded strap like this one feels proportional and substantial.
Simple, effective, and genuinely enjoyable to wear.
Alternatives in the same family:
7. The Wildcard — Natural Babele Slim Strap
Not the obvious choice, but sometimes the unexpected pairing is the best one.
The Natural Babele Slim Strap features Buttero leather from the Walpier tannery in Italy. This vegetable-tanned leather develops one of the most beautiful patinas in watchmaking — scratches blend into the surface and the colour deepens over time. If you enjoy watching your strap age gracefully, this is the one. At 2.2mm thick, it balances presence and wearability nicely.
Paired with the Longines Spirit 37mm's distinctive dial, this strap adds a layer of personality that the factory option does not offer. The case thickness means a padded strap like this one feels proportional and substantial.
Alternatives in the same family:
- Jean Grey Babele Slim Strap
- Mocha Babele Slim Strap
- Moss Green Babele Slim Strap
- Denim Babele Slim Strap
A Note on Buckle Colour
Quick but important: always match your buckle to your case. The Longines Spirit 37mm's 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 37mm
Swapping straps on the Longines Spirit 37mm is one of the easiest upgrades you can make — and with Delugs straps, you don't even need a tool.
If your Longines Spirit 37mm 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 37mm uses a standard 18mm lug width, and all Delugs straps in 18mm will fit perfectly.
Frequently Asked Questions
What is the lug width of the Longines Spirit 37mm?
The Longines Spirit 37mm has a 18mm lug width. 18mm is one of the most common lug widths, so the selection is at its widest. All Delugs straps are available in 18mm.
Can I use a dressy leather strap on the Longines Spirit 37mm?
The Spirit 37mm 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 37mm?
The Spirit 37mm'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 Spirit 37mm?
The Longines Strap Finder shows every Delugs strap compatible with the Longines Spirit 37mm, 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 37mm 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 37mm 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 37mm? 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.
Quick Specs
| Lug width | 18mm |
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
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