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Citizen’s Zenshin Senkei chronograph collection comprises four 41 mm Super Titanium Eco-Drive references: CA4690-51A, CA4690-51E, CA4691-59X and CA4691-59L. They share the collection’s B620 solar-powered movement, sapphire crystal and 10-bar water resistance, while dial color and some listed specifications vary by reference and market. Check the exact model and your regional listing before buying.
Which Citizen Zenshin Senkei references are available?
Citizen’s Europe collection page identifies four references, shown in white, black, green and blue. The official pages confirm CA4690-51A as white and CA4691-59X as green; the collection also lists CA4690-51E and CA4691-59L. Because the exact color pairings for those remaining references are not established by the product details summarized here, check Citizen’s current imagery and local model page rather than inferring the colors from the reference numbers.
| Reference | Dial color confirmed here | What the listed page establishes |
|---|---|---|
| CA4690-51A | White | U.S. product page lists titanium case and bracelet, date, 24-hour display, running seconds and chronograph functions. |
| CA4690-51E | Not stated | Listed on Citizen Europe’s collection page; check the regional product page for color and model-specific details. |
| CA4691-59X | Green | Europe product page lists 41 mm diameter, 11 mm height, 97 g weight and a Super Titanium bracelet. |
| CA4691-59L | Not stated | Listed on Citizen Europe’s collection page; check the regional product page for color and model-specific details. |
These are the Senkei chronographs, not the Zenshin 60 automatic models or earlier CA4610 chronographs. Citizen Italy’s page displayed €459 for the four references when checked; that is a regional listing, not a guaranteed or universal price. Citizen’s U.S. CA4690-51A page showed “Temporarily Out of Stock” when inspected, a status that applies only to that listing and can change. Citizen Europe collection · Citizen Italy collection · Citizen U.S. CA4690-51A
What differs between the CA4690 and CA4691 models?
The reference number alone is not enough to establish every specification. Citizen’s U.S. CA4690-51A page supplies the most detailed function list in the product information summarized here, while the European CA4691-59X page gives additional size and weight figures. Verify the specific page for the reference and market you plan to purchase.
#1 Best Overall
- 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.
CA4690-51A: white dial
Citizen’s U.S. listing specifies a Super Titanium case and bracelet, a date window at 4:30, a 24-hour display, running seconds and a 1/5-second chronograph measuring up to 60 minutes. It lists 100 m/10 bar water resistance and says the watch is suitable for swimming, showering and snorkeling. That guidance does not establish suitability for scuba diving or independent water-resistance certification. See Citizen’s CA4690-51A specifications.
CA4691-59X: green dial
Citizen Europe lists a 41 mm case, 11 mm height, 97 g weight, green dial and Super Titanium bracelet for this reference. Those model-specific figures should not automatically be applied to every Senkei chronograph. See Citizen Europe’s CA4691-59X page.
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.
Movement, power reserve and core specifications
The collection uses Citizen’s in-house B620 Eco-Drive caliber, powered by light. Citizen Europe states accuracy of ±15 seconds per month and a nine-month power reserve when fully charged; the model page expresses the reserve as 270 days. These are manufacturer specifications, not independently verified performance measurements. Citizen’s official description likewise says, “When fully charged, it has a power reserve of nine months.” Citizen Europe’s collection specifications.
Citizen lists a 41 mm case diameter, scratch-resistant sapphire crystal and 10 bar water resistance for the collection. Individual model pages may provide further measurements and functions, so treat the collection-level specifications as a starting point rather than a substitute for checking the exact reference.
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Rank #3
- 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.
Is the Zenshin Senkei made of titanium?
Yes. Citizen lists Super Titanium for the case and bracelet on the CA4690-51A U.S. page, and a Super Titanium bracelet on the CA4691-59X European page. Citizen describes Super Titanium as light and scratch-resistant and associates the collection with Duratect surface treatment. Citizen Italy says the base material is grade 2 titanium and that the treated surface is up to five times more scratch-resistant than steel. These are Citizen’s material claims; no independent comparative test is established here. Citizen Italy’s collection description.
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
What to check before choosing one
- Reference and dial: Match the full reference to the dial shown on your local Citizen product page, especially for CA4690-51E and CA4691-59L.
- Functions: Confirm the date, display and chronograph details on that exact model page; the detailed feature list cited above is for the CA4690-51A.
- Fit and weight: The listed 41 mm diameter applies to the collection; the 11 mm height and 97 g weight are specifically listed for CA4691-59X.
- Local availability and price: Regional listings differ and can change. Check stock and price where you intend to buy rather than relying on another country’s page.
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.
