








Black Steel
Chronograph · Skeleton Dial · 53 mm

Black Steel Black Steel, Chronograph, Skeleton Dial, 53 mm
The CVSTOS Challenge CHAL-001 is a statement piece that reflects your audacious spirit and appreciation for quality engineering. It's the perfect companion for those who push boundaries and live life to the fullest. This limited-edition timepiece seamlessly blends innovative design with exceptional functionality, ensuring it can conquer any challenge, just like you.
Crafted from lightweight, ultra-durable materials, its imposing 53mm case is water resistant up to 100 meters (10 ATM). At its heart lies a Swiss-made automatic movement with a 2-day power reserve, ensuring uninterrupted timekeeping on your next adventure, whether you're conquering demanding trails or diving deep beneath the waves.
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Built for collectors, ready for first-time buyers.
Watch Details
- SKU
- G0CHAL-001
- Brand
- Cvstos
- Model
- Cvstos Challenge
- Reference Number
- Challenge
- Condition
- Pre-Owned
- Box
- Original Factory Box
- Papers
- Original Factory Papers
Case & Bezel
- Case Size
- 53MM
- Bezel
- Stainless Steel
- Bezel Function
- Fixed
Bracelet
- Bracelet Material
- Black Leather
- Closure
- Pin Buckle
- Closure Material
- Rose Gold
Features
- Water Resistance
- 100 meters / 330 feet
Included
What comes with this watch
- 01 Original factory boxPresentation case included
- 02 Original factory papersWarranty card included
- 03 2-year Avi & Co. warrantyLimited service warranty
- 04 100% authenticationInspected in-house by our watchmakers
THE AVI & CO. PROMISE
Confidence, built into every purchase.
Every timepiece we offer is authenticated, backed by the Avi & Co. limited warranty, and supported by a team that believes the relationship should continue long after the purchase.

100% AUTHENTIC
Verified before it reaches you.
Every watch we sell is reviewed by our team for authenticity, condition, and functionality before it is offered for sale. We stand behind every piece that carries the Avi & Co. name.

AVI & CO. LIMITED WARRANTY
Protection beyond the purchase.
Your watch is backed by the Avi & Co. limited warranty, giving you added confidence long after you leave the showroom. Coverage varies by condition and is subject to our warranty terms.

PERSONAL SERVICE
White-glove service, for life.
Whether it’s your first watch or the next addition to your collection, our specialists remain a resource for service, sourcing, selling, trading, and whatever comes next.
FAQS
Frequently asked.
01 What does the name CVSTOS mean?
The name of the watch brand CVSTOS comes from the Latin word custos, which roughly translates to guardian or guardian of time. This choice of name reflects the mission of the CVSTOS brand, which is focused on acting as a guardian of classic Swiss watchmaking techniques while also pushing the industry forward with modern innovations and avant-garde design choices. In the company’s name, the U has been subbed out for a stylized V, which stands for victory. This ties together the brand’s commitment to high-end engineering and unmatched performance and innovation.
02 What is the watch brand CVSTOS known for?
The watch brand CVSTOS is known for its high-tech, avant-garde approach to traditional Swiss watchmaking. It combines sporty, new-age designs with legacy craftsmanship and meticulous engineering. Some of the brand’s most distinctive features include tonneau-shaped cases, skeletonized movements, elite performance, and advanced materials.
03 What makes CVSTOS unique?
Swiss timepiece brand CVSTOS is unique and distinguishes itself from other luxury watch maisons through its low production volume, in-house movements, and memorable design language. The company releases just 2,000 pieces each year, an extremely low figure that keeps its watches highly desirable and coveted among collectors. Its tonneau-shaped cases stand out from more traditional round silhouettes, and its commitment to innovation has allowed the brand to use unique materials (like titanium, carbon, aluminum, and colored sapphire crystal) to enhance both aesthetics and functionality.
04 What are the most popular CVSTOS watch collections?
Some of the most popular, iconic CVSTOS watch collections include the Challenge Jet-Liner and Sea-Liner, the Challenge Purity, the Metropolitan, and the Re-Belle.
- Challenge Jet-Liner: A line inspired by aviation and aeronautics, often considered CVSTOS’ flagship line and the cornerstone of the Challenge collections.
- Challenge Sea-Liner: A nautical take on the brand’s signature tonneau shape, featuring high levels of water resistance and marine design coding.
- Challenge Purity: A minimalist timepiece focused on showcasing exposed movements and high complications in a transparent case.
- Metropolitan: An everyday, sporty-chic watch that retains the brand’s signature tonneau case and distinctive design identity.
- Re-Belle: The brand’s signature collection for women, which adds glamorous touches like mother of pearl and decadent diamond gem-setting.
05 What is the connection between CVSTOS and Franck Muller?
The watch brands CVSTOS and Franck Muller have a familial connection, although they operate as separate entities. CVSTOS was founded in 2005 by Sassoun Sirmakes, who is the son of Vartan Sirmakes, the co-founder and president of the Franck Muller Watchland group. Sassoun grew up immersed in the watchmaking industry alongside his father, but then branched out from the world of Franck Muller to create his own company. Many point to some similarities between the brands, such as their usage of tonneau-shaped cases. However, CVSTOS and Franck Muller also have significant differences. While Franck Muller often leans into more traditional aesthetics, CVSTOS tends to push the boundaries of watchmaking a bit more.
Authenticity
Inspected in-house by certified watchmakers
Watch experts
Decades of luxury-watch expertise
Schedule appointment
Private viewings in NYC, Miami, Aspen
2-year warranty
Mechanical movement, parts & service