Grand Seiko SBGH273 · Ref. SBGH273 · 21mm lug · 40mm case
At a Glance
| # | Best For | Strap | Material | Thickness |
|---|---|---|---|---|
| 1 | Overall / First Purchase | Taupe Saffiano Signature Strap | Saffiano Calfskin | 4.5–2.2mm |
| 2 | Dressy / Formal | Matte Ocean Blue Alligator Signature Strap | Alligator | 4.5–2.2mm |
| 3 | Everyday / Casual | Pastel Blue Nubuck Slim Strap | Nubuck Calfskin | 2.2mm |
| 4 | Minimalist / Refined | Black Shell Cordovan Slim Strap | Shell Cordovan | 2.2mm |
| 5 | Casual / Relaxed | Mocha Crazy Horse Side-Stitch Strap | Waxy Leather | 2.5mm |
| 6 | Active / Sporty | Olive Green Pilot CTS Rubber Strap | FKM Rubber | 4.0–3.3mm |
| 7 | Comfort / Wildcard | Mocha Babele Slim Strap | Babele Calfskin | 2.2mm |
Grand Seiko does not chase trends — it sets standards. The SBGH273 (ref. SBGH273) is a case in point. The finishing and attention to detail speak for themselves. A 21mm lug width and that unmistakable character make this watch a natural platform for strap changes.
The case measures 40mm with a thickness of 12.9mm — proportions that sit comfortably on most wrists without dominating them. The Zaratsu polishing on the case creates those signature mirror-flat surfaces that catch light like nothing else in this price range. It strikes that balance between presence and wearability that makes it suited to almost any strap.
Here are my 7 picks — and why each one works.
Quick Specs
| Case diameter | 40mm |
| Lug width | 21mm |
| Lug-to-lug | 47mm |
| Case thickness | 12.9mm |
| Water resistance | 100m |
| Crystal | Sapphire with AR coating |
| Case material | Stainless steel |
| Movement | Caliber 9S85 (Hi-Beat 36000 automatic, 55h power reserve) |
The 21mm lug width means your options are curated but well-covered. Already know what you're looking for? Browse all Grand Seiko SBGH273-compatible straps on the Strap Finder →
1. Best Overall — Taupe Saffiano Signature Strap
Your first strap upgrade should feel like an obvious improvement. This one does.
The Taupe Saffiano Signature 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 4.5–2.2mm thick, it balances presence and wearability nicely.
The Grand Seiko SBGH273's 40mm 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.
Simple, effective, and genuinely enjoyable to wear.
Alternatives in the same family:
2. Best Dressy — Matte Ocean Blue Alligator Signature Strap
There's dressy, and then there's refined. This strap lands squarely in refined territory.
The Matte Ocean Blue 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.
The Grand Seiko SBGH273's 40mm 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.
Alternatives in the same family:
- Matte Black Alligator Signature Strap
- Matte Navy Alligator Signature Strap
- Matte Himalayan Alligator Signature Strap
- Matte Mahogany Alligator Signature Strap
3. Best Everyday — Pastel Blue Nubuck Slim Strap
An everyday strap needs to be comfortable from the jump and work with most of what you wear.
The Pastel Blue 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.
On the Grand Seiko SBGH273, this strap preserves the watch's go-anywhere character. The 40mm case at 12.9mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
It's the kind of pairing that makes you wonder why you didn't try it sooner.
Other colours worth considering:
- Natural Nubuck Slim Strap
- Navy Nubuck Slim Strap
- Light Grey Nubuck Slim Strap
- Dark Brown Nubuck 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 Grand Seiko SBGH273's 40mm 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.
It's the kind of pairing that makes you wonder why you didn't try it sooner.
Other colours worth considering:
- Navy Shell Cordovan Slim Strap
- Cognac Shell Cordovan Slim Strap
- Natural Shell Cordovan Slim Strap
- Green Shell Cordovan Slim Strap
5. Best Casual — Mocha Crazy Horse Side-Stitch Strap
For those days when the Grand Seiko SBGH273 comes out with jeans and a t-shirt.
The Mocha 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.
On the Grand Seiko SBGH273, this strap preserves the watch's go-anywhere character. The 40mm case at 12.9mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
Once you see it on the wrist, it just clicks.
The range goes deeper if you want to explore:
- Black 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 — Olive Green Pilot CTS Rubber Strap
When you need your Grand Seiko SBGH273 ready for anything active, this is the pick — water-resistant, comfortable, and built to last.
The Olive Green Pilot 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.
On the Grand Seiko SBGH273, this strap preserves the watch's go-anywhere character. The 40mm case at 12.9mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
It's the kind of pairing that makes you wonder why you didn't try it sooner.
Other colours worth considering:
7. The Wildcard — Mocha Babele Slim Strap
Think of this as the strap you didn't know you needed.
The Mocha 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.
The Grand Seiko SBGH273's 40mm 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.
A combination that's greater than the sum of its parts.
Worth a look in other colourways:
- Natural Babele Slim Strap
- Jean Grey 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 Grand Seiko SBGH273's Stainless steel 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 Grand Seiko SBGH273
Swapping straps on the Grand Seiko SBGH273 is one of the easiest upgrades you can make — and with Delugs straps, you don't even need a tool.
If your Grand Seiko SBGH273 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 Grand Seiko SBGH273 uses a standard 21mm lug width, and all Delugs straps in 21mm will fit perfectly.
Frequently Asked Questions
What is the lug width of the Grand Seiko SBGH273?
The Grand Seiko SBGH273 has a 21mm lug width. While 21mm is less common than 20mm, there is still a strong selection of quality straps available. All Delugs straps are available in 21mm.
What is the reference number for the Grand Seiko SBGH273?
The reference number for the Grand Seiko SBGH273 is SBGH273. 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 Grand Seiko versatile watch?
The SBGH273 is one of the most versatile watches in the Grand Seiko 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 Grand Seiko SBGH273?
The SBGH273'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 Grand Seiko use quick-release spring bars?
Most Grand Seiko models do not come with quick-release spring bars from the factory — they use standard spring bars that require a spring bar tool to remove. However, all Delugs straps come with quick-release spring bars pre-installed, so once you switch to a Delugs strap, all future strap changes will be tool-free.
Where can I find straps compatible with the Grand Seiko SBGH273?
The Grand Seiko Strap Finder shows every Delugs strap compatible with the SBGH273, 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 Grand Seiko SBGH273 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 Grand Seiko SBGH273 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 Grand Seiko Strap Finder lets you browse the full lineup and find your match.
Not sure which strap is right for your specific SBGH273? 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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