The Studio Underd0g x Massena LAB 03SERIES Champagne & Caviar is a 200-piece, hand-wound monopusher chronograph, reference 03CHB. Its champagne-toned dial, oversized “big-eye” minute counter and caviar-inspired detailing set it apart; the official Massena LAB listing currently marks it sold out. The dimensions, movement and launch price below are manufacturer-stated specifications and original launch terms, not independent test results or a current offer.
What is the Champagne & Caviar 03SERIES?
It is a collaboration between British independent watch brand Studio Underd0g and Massena LAB. Hodinkee identifies the model as reference 03CHB, and Massena LAB describes it as a limited-edition monopusher chronograph. The collaboration was unveiled in 2025; Massena LAB describes Studio Underd0g as founded in 2020 by industrial designer Richard Benc. Hodinkee’s launch coverage and Massena LAB’s partnership overview provide additional background.
The name is reflected in the dial rather than just its color palette: the oversized 30-minute counter evokes a pot of caviar, while the chronograph hand has a champagne-bottle silhouette at its base. The dial pairs champagne tones with dark details; the exhibition caseback reveals a custom ruthenium-anthracite-finished movement bridge, which the maker says was made exclusively for Studio Underd0g.
Movement and chronograph functions
Massena LAB specifies a Swiss-made, hand-wound Sellita SW510 M in Elaboré grade. It is cam-operated and runs at 28,800 vibrations per hour (4 Hz), with 23 jewels and a stated 63-hour power reserve. The maker lists an Elaboré grade accuracy of ±5 seconds per day; this is a specification, not an independent test result.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
The monopusher arrangement operates the chronograph through a single pusher. The watch displays hours and minutes, small seconds, elapsed chronograph minutes on a 30-minute counter, and a tachymeter scale. The product listing does not specify detailed pusher sequences or operating instructions, so consult the watch’s manual for use and care.
Case size, water resistance and strap
| Specification | Massena LAB listing |
|---|---|
| Case diameter | 38.5 mm |
| Total thickness | 13.6 mm; 10.8 mm excluding the crystal |
| Lug-to-lug | 44.5 mm |
| Lug width | 20 mm |
| Case material | 316L stainless steel |
| Water resistance | 50 m / 5 ATM |
| Crystal | Double-domed sapphire on the dial side; flat box sapphire in the exhibition caseback |
These dimensions are manufacturer-stated. Diameter alone does not establish how a watch will fit a particular wrist; lug-to-lug and thickness are useful additional measurements to compare with a watch you already wear.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
The supplied strap is handmade pebble-grain calfskin by The Strap Tailor, fitted with quick-release spring bars and a stainless-steel buckle. For a replacement, the stated lug width is 20 mm, so search for a 20 mm quick-release watch strap and check that the spring bars and attachment suit the case. A third-party strap should not be assumed to match the supplied strap’s fit, taper or finish.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Original price, edition size and current availability
Massena LAB stated a production limit of 200 individually numbered pieces. Its original launch listing gave prices of £1,750, $2,200 and €1,800, with the exclusive online release scheduled for 3 pm GMT on November 11, 2025. Those figures describe the launch terms, not a current retail offer. The listing also says the watch was assembled in Great Britain and includes a two-year guarantee.
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- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
The official Massena LAB product page currently displays “sold out” and a waitlist prompt. The Massena LAB Studio Underd0g collection and Studio Underd0g homepage also list the collaboration as a special edition. A waitlist prompt does not confirm a restock date. No current secondary-market availability or pricing is established here.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
