Tissot Gentleman Open Heart · Ref. TISSOT GENTLEMAN OPEN HEART 2025 · 17mm lug
At a Glance
| # | Best For | Strap | Material | Thickness |
|---|---|---|---|---|
| 1 | Overall / First Purchase | Orange Epsom Slim Strap | Epsom Calfskin | 2.2mm |
| 2 | Dressy / Formal | Matte Boreal Green Alligator Signature Strap | Alligator | 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 | Black Crazy Horse Side-Stitch Strap | Waxy Leather | 2.5mm |
| 6 | Active / Sporty | Brown Alcantara Signature "Teddy Bear" Strap | Alcantara | 4.5–2.2mm |
| 7 | Comfort / Wildcard | Light Grey Epsom Slim Strap | Epsom Calfskin | 2.2mm |
There is a reason the Tissot Gentleman Open Heart (ref. TISSOT GENTLEMAN OPEN HEART 2025) keeps showing up in conversations about the best watches in its class. The finishing and attention to detail speak for themselves. It wears its 17mm lug width elegantly, and that is where aftermarket straps come in.
At across and thick, the Gentleman Open Heart wears like a watch that was designed to be lived with — not just admired behind glass. A strap change can take it from boardroom to weekend without missing a beat.
Here are my 7 picks — and why each one works.
Quick Specs
| Case diameter | |
| Lug width | 17mm |
| Lug-to-lug | |
| Case thickness | |
| Water resistance | |
| Crystal | |
| Case material | |
| Movement |
The 17mm lug width means your options are curated but well-covered. Already know what you're looking for? Browse all Tissot Gentleman Open Heart-compatible straps on the Strap Finder →
1. Best Overall — Orange Epsom Slim Strap
Every watch needs a go-to strap, and for the Tissot Gentleman Open Heart, this is it.
The Orange Epsom Slim Strap features Epsom leather, tanned by Haas. The fine, uniform grain gives it a clean, contemporary look that resists scratches and moisture with ease. This is leather that looks as sharp six months from now as it does on day one. At 2.2mm thick, it balances presence and wearability nicely.
Paired with the Tissot Gentleman Open Heart'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 Epsom Slim Strap
- Tinware Grey Epsom Slim Strap
- Hunter Green Epsom Slim Strap
- Izmir Blue Epsom Slim Strap
2. Best Dressy — Matte Boreal Green Alligator Signature Strap
Formal occasions call for something elevated. This delivers without being flashy.
The Matte Boreal Green 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.
Paired with the Tissot Gentleman Open Heart'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.
A combination that's greater than the sum of its parts.
Worth a look in other colourways:
- Matte Black Alligator Signature Strap
- Matte Navy Alligator Signature Strap
- Matte Himalayan Alligator Signature Strap
- Matte Mahogany Alligator Signature Strap
3. Best Everyday — Black Nubuck Slim Strap
For daily wear, comfort and versatility matter more than anything else.
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.
Paired with the Tissot Gentleman Open Heart'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:
- 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
Minimalism isn't about doing less. It's about doing exactly what's needed.
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.
Paired with the Tissot Gentleman Open Heart'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.
A combination that's greater than the sum of its parts.
Worth a look in other colourways:
- Black Shell Cordovan Slim Strap
- Navy Shell Cordovan Slim Strap
- Cognac Shell Cordovan Slim Strap
- Natural Shell Cordovan Slim Strap
5. Best Casual — Black Crazy Horse Side-Stitch Strap
Weekend straps should feel effortless. This one nails that.
The Black Crazy Horse Side-Stitch Strap uses crazy horse leather — an oil-infused leather that develops character with every scratch and mark. Rub a scratch with your thumb and it blends right back in. It is built for people who actually wear their watches, not baby them. At 2.5mm thick, it balances presence and wearability nicely.
The Tissot Gentleman Open Heart'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.
If this style appeals but you want a different tone:
- Mocha Crazy Horse Side-Stitch Strap
- Tan Crazy Horse Side-Stitch Strap
- Cognac Crazy Horse Side-Stitch Strap
- Rust Crazy Horse Side-Stitch Strap
6. Best Sporty — Brown Alcantara Signature "Teddy Bear" Strap
When you want your Tissot Gentleman Open Heart to feel more relaxed and sporty, this is the pick.
The Brown Alcantara Signature "Teddy Bear" Strap is crafted from Alcantara — the same Italian material used in luxury car interiors and high-end sportswear. It has a suede-like softness that is immediately comfortable, with a luxurious hand feel that belies its toughness. At 4.5–2.2mm thick, it balances presence and wearability nicely.
On the Tissot Gentleman Open Heart, this strap preserves the watch's go-anywhere character. The case at thick 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:
- Dark Grey Alcantara Signature Strap
- Baby Blue Alcantara Signature Strap
- Dark Brown Alcantara Signature Strap
- Green Alcantara Signature Strap
7. The Wildcard — Light Grey Epsom Slim Strap
Every rotation needs a curveball. This is mine.
The Light Grey Epsom Slim Strap features Epsom leather, tanned by Haas. The fine, uniform grain gives it a clean, contemporary look that resists scratches and moisture with ease. This is leather that looks as sharp six months from now as it does on day one. At 2.2mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Tissot Gentleman Open Heart is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a case, the proportions stay balanced.
Other colours worth considering:
- Black Epsom Slim Strap
- Tinware Grey Epsom Slim Strap
- Hunter Green Epsom Slim Strap
- Izmir Blue Epsom Slim Strap
A Note on Buckle Colour
Quick but important: always match your buckle to your case. The Tissot Gentleman Open Heart'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 Tissot Gentleman Open Heart
Swapping straps on the Tissot Gentleman Open Heart is one of the easiest upgrades you can make — and with Delugs straps, you don't even need a tool.
If your Tissot Gentleman Open Heart 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 Tissot Gentleman Open Heart uses a standard 17mm lug width, and all Delugs straps in 17mm will fit perfectly.
Frequently Asked Questions
What is the lug width of the Tissot TISSOT GENTLEMAN OPEN HEART 2025?
The Tissot TISSOT GENTLEMAN OPEN HEART 2025 has a 17mm lug width. While 17mm is less common than 20mm, there is still a strong selection of quality straps available. All Delugs straps are available in 17mm.
What is the reference number for the Tissot Gentleman Open Heart?
The reference number for the Tissot Gentleman Open Heart is TISSOT GENTLEMAN OPEN HEART 2025. 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 Tissot versatile watch?
The Gentleman Open Heart is one of the most versatile watches in the Tissot 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 Tissot Gentleman Open Heart?
The Gentleman Open Heart'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 Tissot use quick-release spring bars?
Most Tissot 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 Tissot TISSOT GENTLEMAN OPEN HEART 2025?
The Tissot Strap Finder shows every Delugs strap compatible with the TISSOT GENTLEMAN OPEN HEART 2025, 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 Tissot Gentleman Open Heart 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 Tissot Gentleman Open Heart 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 Tissot Strap Finder lets you browse the full lineup and find your match.
Not sure which strap is right for your specific Gentleman Open Heart? 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
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