Junghans Form A · Ref. JUNGHANS FORM A · 20mm lug · 39.3mm case
At a Glance
| # | Best For | Strap | Material | Thickness |
|---|---|---|---|---|
| 1 | Overall / First Purchase | Red Chevre Slim Strap | Chèvre | 2.2mm |
| 2 | Dressy / Formal | Matte Oatmeal Alligator Signature Strap | Alligator | 4.5–2.2mm |
| 3 | Everyday / Casual | Sand Nubuck Slim Strap | Nubuck Calfskin | 2.2mm |
| 4 | Minimalist / Refined | Natural Shell Cordovan Slim Strap | Shell Cordovan | 2.2mm |
| 5 | Casual / Relaxed | Gold Baranil Signature Strap | Baranil Calfskin | 4.5–2.2mm |
| 6 | Active / Sporty | Navy CTS Rubber Strap | FKM Rubber | 4.0–3.3mm |
| 7 | Comfort / Wildcard | Orange Hook Strap [kollokium x Delugs] | Fabric | 1.3mm |
On paper, the Junghans Form A (ref. JUNGHANS FORM A) checks every box. On the wrist, it exceeds expectations. The finishing and attention to detail speak for themselves. The 20mm lug width is well-served by a range of aftermarket straps that can shift its personality entirely.
The 39.3mm case with its 9.1mm 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 | 39.3mm |
| Lug width | 20mm |
| Lug-to-lug | |
| Case thickness | 9.1mm |
| Water resistance | 50m (5 bar) |
| Crystal | |
| Case material | Stainless steel |
| Movement |
The 20mm lug width means your options are curated but well-covered. Already know what you're looking for? Browse all Junghans Form A-compatible straps on the Strap Finder →
1. Best Overall — Red Chevre Slim Strap
There's a reason this is the number one pick — it just works.
The Red Chevre Slim Strap is made from chevre (goatskin) leather, sourced from the Alran tannery. The natural pebbled grain is finer than Epsom and slightly shiny — it looks luxurious without trying too hard. Chevre is also impressively water and scratch resistant for a natural leather. At 2.2mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Junghans Form A is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 39.3mm case, the proportions stay balanced.
Other colours worth considering:
- Light Grey Chevre Slim Strap
- Colibri Chevre Slim Strap
- Lavender Chevre Slim Strap
- Gold Chevre Slim Strap
2. Best Dressy — Matte Oatmeal Alligator Signature Strap
The Junghans Form A cleans up remarkably well — and this strap is the reason.
The Matte Oatmeal 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 Junghans Form A is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 39.3mm case, the proportions stay balanced.
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 — Sand Nubuck Slim Strap
The strap you reach for without thinking — that's what an everyday pick should be.
The Sand 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 Junghans Form A is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 39.3mm case, the proportions stay balanced.
A combination that's greater than the sum of its parts.
Worth a look in other colourways:
- Natural Nubuck Slim Strap
- Navy Nubuck Slim Strap
- Light Grey Nubuck Slim Strap
- Dark Brown Nubuck Slim Strap
4. Best Minimalist — Natural Shell Cordovan Slim Strap
Strip away the unnecessary and what's left is pure design. That's this strap.
The Natural 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 Junghans Form A's 39.3mm 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:
- Black Shell Cordovan Slim Strap
- Navy Shell Cordovan Slim Strap
- Cognac Shell Cordovan Slim Strap
- Green Shell Cordovan Slim Strap
5. Best Casual — Gold Baranil Signature Strap
Weekend straps should feel effortless. This one nails that.
The Gold 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.
The Junghans Form A's 39.3mm 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:
- Fauve Baranil Signature Strap
- Black Baranil Signature Strap
- Cobalt Baranil Signature Strap
- Cream Baranil Signature Strap
6. Best Sporty — Navy CTS Rubber Strap
Function first, style a close second. This water-resistant pick balances both.
The Navy 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.
The Junghans Form A's 39.3mm 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:
7. The Wildcard — Orange Hook Strap [kollokium x Delugs]
![Orange Hook Strap [kollokium x Delugs] on Junghans Form A](https://cdn.shopify.com/s/files/1/0054/9040/9585/files/20251113-A7407232.jpg?v=1763343440&width=800)
Not the obvious choice, but sometimes the unexpected pairing is the best one.
The Orange 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.
![Orange Hook Strap [kollokium x Delugs]](https://cdn.shopify.com/s/files/1/0054/9040/9585/files/Kollokiumstraps_Orange.jpg?v=1763343386)
Paired with the Junghans Form A's distinctive dial, this strap adds a layer of personality that the factory option does not offer. The 9.1mm case thickness means a padded strap like this one feels proportional and substantial.
Other colours worth considering:
- Warm Grey Hook Strap [kollokium x Delugs]
- Anthracite Hook Strap [kollokium x Delugs]
- Black Hook Strap [kollokium x Delugs]
- Khaki-Green Hook Strap [kollokium x Delugs]
A Note on Buckle Colour
Quick but important: always match your buckle to your case. The Junghans Form A'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 Junghans Form A
Swapping straps on the Junghans Form A is one of the easiest upgrades you can make — and with Delugs straps, you don't even need a tool.
If your Junghans Form A 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 Junghans Form A 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 Junghans JUNGHANS FORM A?
The Junghans JUNGHANS FORM A 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 Junghans Form A?
The reference number for the Junghans Form A is JUNGHANS FORM A. 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 Junghans versatile watch?
The Form A is one of the most versatile watches in the Junghans 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 Junghans Form A?
The Form A'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 Junghans use quick-release spring bars?
Most Junghans 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 Junghans JUNGHANS FORM A?
The Junghans Strap Finder shows every Delugs strap compatible with the JUNGHANS FORM A, 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 Junghans Form A 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 Junghans Form A 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 Junghans Strap Finder lets you browse the full lineup and find your match.
Not sure which strap is right for your specific Form A? 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)
Buy One, Get One 15% Off
