Cartier Calibre de Cartier 42 · Ref. W7100041 · 24mm lug · 42mm case
At a Glance
| # | Best For | Strap | Material | Thickness |
|---|---|---|---|---|
| 1 | Overall / First Purchase | Brown Buttero Chunky Strap | Buttero Calfskin | 3.0mm |
| 2 | Dressy / Formal | Tan Crazy Horse Chunky Strap | Waxy Leather | 3.0mm |
| 3 | Everyday / Casual | Jean Grey Babele Chunky Strap | Babele Calfskin | 3.0mm |
| 4 | Minimalist / Refined | Cognac Crazy Horse Chunky Strap | Waxy Leather | 3.0mm |
| 5 | Casual / Relaxed | Maroon Crazy Horse Chunky Strap | Waxy Leather | 3.0mm |
| 6 | Active / Sporty | Orange Buttero Chunky Strap | Buttero Calfskin | 3.0mm |
| 7 | Comfort / Wildcard | Mocha Crazy Horse Chunky Strap | Waxy Leather | 3.0mm |
Cartier's watches are not trying to be like Swiss tool watches — they are doing their own thing, and that confidence is magnetic. The Calibre de Cartier 42 (ref. W7100041) is a case in point. Its silver opaline dial with Roman numerals, sword-shaped hands, small seconds at 6 o'clock. A 24mm lug width and that unmistakable character make this watch a natural platform for strap changes.
The 42mm case with its 11mm 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 | 24mm |
| Lug-to-lug | 51mm |
| Case thickness | 11mm |
| Water resistance | 30m |
| Crystal | Sapphire |
| Case material | Stainless steel |
| Movement | Cartier Calibre 1904-PS MC automatic |
The 24mm lug width means your options are curated but well-covered. Already know what you're looking for? Browse all Cartier Calibre de Cartier 42-compatible straps on the Strap Finder →
1. Best Overall — Brown Buttero Chunky Strap
There's a reason this is the number one pick — it just works.
The Brown Buttero Chunky 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 3.0mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Cartier Calibre de Cartier 42 is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 42mm case, the proportions stay balanced.
2. Best Dressy — Tan Crazy Horse Chunky Strap
There's dressy, and then there's refined. This strap lands squarely in refined territory.
The Tan Crazy Horse Chunky 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 3.0mm thick, it balances presence and wearability nicely.
The Cartier Calibre de Cartier 42'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.
3. Best Everyday — Jean Grey Babele Chunky Strap
Your daily strap should feel invisible on the wrist. This one gets close.
The Jean Grey Babele Chunky 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 3.0mm thick, it balances presence and wearability nicely.
The Cartier Calibre de Cartier 42'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.
4. Best Minimalist — Cognac Crazy Horse Chunky Strap
Clean lines and no visual clutter — that's the appeal here.
The Cognac Crazy Horse Chunky 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 3.0mm thick, it balances presence and wearability nicely.
What makes this pairing work on the Cartier Calibre de Cartier 42 is the contrast — the refined case finishing against the texture creates visual interest without conflict. With a 42mm case, the proportions stay balanced.
Once you see it on the wrist, it just clicks.
5. Best Casual — Maroon Crazy Horse Chunky Strap
For those days when the Cartier Calibre de Cartier 42 comes out with jeans and a t-shirt.
The Maroon Crazy Horse Chunky 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 3.0mm thick, it balances presence and wearability nicely.
On the Cartier Calibre de Cartier 42, this strap preserves the watch's go-anywhere character. The 42mm case at 11mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
6. Best Sporty — Orange Buttero Chunky Strap
When you want your Cartier Calibre de Cartier 42 to feel more relaxed and sporty, this is the pick.
The Orange Buttero Chunky 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 3.0mm thick, it balances presence and wearability nicely.
On the Cartier Calibre de Cartier 42, this strap preserves the watch's go-anywhere character. The 42mm case at 11mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
The kind of strap that earns a permanent spot in your rotation.
7. The Wildcard — Mocha Crazy Horse Chunky Strap
This one's different — and that's exactly the point.
The Mocha Crazy Horse Chunky 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 3.0mm thick, it balances presence and wearability nicely.
On the Cartier Calibre de Cartier 42, this strap preserves the watch's go-anywhere character. The 42mm case at 11mm thick pairs naturally with the padded construction without creating any imbalance on the wrist.
A Note on Buckle Colour
Quick but important: always match your buckle to your case. The Cartier Calibre de Cartier 42'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 Cartier Calibre de Cartier 42
Swapping straps on the Cartier Calibre de Cartier 42 is one of the easiest upgrades you can make — and with Delugs straps, you don't even need a tool.
If your Cartier Calibre de Cartier 42 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 Cartier Calibre de Cartier 42 uses a standard 24mm lug width, and all Delugs straps in 24mm will fit perfectly.
Frequently Asked Questions
What is the lug width of the Cartier W7100041?
The Cartier W7100041 has a 24mm lug width. While 24mm is less common than 20mm, there is still a strong selection of quality straps available. All Delugs straps are available in 24mm.
What is the reference number for the Cartier Calibre de Cartier 42?
The reference number for the Cartier Calibre de Cartier 42 is W7100041. 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 Cartier versatile watch?
The Calibre de Cartier 42 is one of the most versatile watches in the Cartier 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 Cartier Calibre de Cartier 42?
The Calibre de Cartier 42'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 Cartier use quick-release spring bars?
Most Cartier 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 Cartier W7100041?
The Cartier Strap Finder shows every Delugs strap compatible with the W7100041, 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 Cartier Calibre de Cartier 42 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 Cartier Calibre de Cartier 42 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 Cartier Strap Finder lets you browse the full lineup and find your match.
Not sure which strap is right for your specific Calibre de Cartier 42? 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)
