The Seiko Prospex SPB185J1 and SPB187J1 are closely related modern divers inspired by Seiko’s 1968 diver. Their core specifications are shared; the clearest difference is appearance: the SPB185J1 pairs a matte black dial with a brushed metallic bezel insert, while the SPB187J1 has a brushed blue dial and black bezel insert.
What’s the difference between the Seiko SPB185 and SPB187?
For these J1 references, the principal distinction is the dial and bezel treatment. Monochrome Watches describes the SPB185J1 as having a matte black dial and brushed metallic bezel insert, and the SPB187J1 as having a brushed blue dial and black bezel insert. Seiko’s Philippines Official Store likewise describes the SPB187J1 as a deep-blue-dial watch with a bold black unidirectional bezel. Monochrome Watches’ review and Seiko Philippines’ SPB187J1 listing support those descriptions.
| Feature | SPB185J1 | SPB187J1 |
|---|---|---|
| Dial and bezel appearance | Matte black dial; brushed metallic bezel insert (Monochrome Watches review, circa 2020) | Brushed blue or deep blue dial; black bezel insert (Monochrome Watches review, circa 2020; Seiko Philippines Official Store) |
| Case diameter | 42 mm (Monochrome Watches review, circa 2020; Seiko Brazil product listing) | 42 mm (Monochrome Watches review, circa 2020) |
| Case height | 12.5 mm (Monochrome Watches review, circa 2020) | 12.5 mm (Monochrome Watches review, circa 2020) |
| Movement | Automatic Seiko caliber 6R35 (Monochrome Watches review; Seiko Brazil product listing) | Automatic Seiko caliber 6R35 (Monochrome Watches review) |
| Water resistance | 200 m (Monochrome Watches review; Seiko Brazil product listing) | 200 m / 660 ft (Monochrome Watches review; Seiko Philippines Official Store) |
The sources do not establish a difference in their core specifications. The practical choice is therefore mostly visual: the SPB185J1 is the more monochrome option, while the SPB187J1 adds blue to the dial and keeps the bezel black.
Is the SPB187 just the blue version of the SPB185?
That is a useful shorthand for the most visible difference, but it is not a complete specification comparison. The SPB187J1 has a blue dial and black bezel insert; the SPB185J1 pairs a black dial with a brushed metallic insert. The reviewed pair otherwise share the listed 42 mm case, 12.5 mm height, sapphire crystal, screw-down crown, caliber 6R35 and 200 m rating. The available sources do not establish any further technical distinction between these exact references.
#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.
How big is the Seiko SPB185J1?
Monochrome Watches reports a 42 mm case diameter and 12.5 mm case height for both watches; Seiko Brazil’s SPB185J1 listing also specifies a 42 mm case width. Monochrome characterizes the case presence as imposing. These measurements and that reviewer’s impression offer a useful starting point, but case diameter alone cannot determine how a watch will fit a particular wrist.
What movement is in the Seiko SPB185J1 and SPB187J1?
Both use Seiko’s automatic caliber 6R35, according to Monochrome Watches. Seiko Brazil independently lists the 6R35 for the SPB185J1. The SPB185J1 product listing also specifies a date display and 24 jewels. The cited material does not provide a comparative accuracy test, so it cannot establish how these watches perform against one another in daily timekeeping.
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.
How water resistant are the SPB185J1 and SPB187J1?
Both modern references are rated to 200 m. Seiko Brazil lists a 200 m diver rating for the SPB185J1, and Seiko Philippines gives the SPB187J1 a 200 m / 660 ft diver’s rating. The 300 m figure sometimes associated with this design lineage belongs to the historical 1968 Seiko diver, not these reinterpretations.
How the 1968 original relates to these modern divers
Seiko’s heritage page describes the original 1968 watch as a high-beat diver with 300 metres of water resistance, a one-piece case, screw-down crown and unidirectional rotating bezel. Seiko says it was created three years after the company’s first diver’s watch. That history explains the inspiration; it should not be mistaken for the SPB185J1 or SPB187J1’s specification. Seiko’s 1968 diver heritage page provides the historical context.
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.
Which one should you choose?
- Choose the SPB185J1 if you prefer a black dial and a brushed metallic bezel insert for a more restrained, monochrome look.
- Choose the SPB187J1 if you want a blue dial contrasted with a black bezel insert.
The cited pages establish model specifications and design, not current prices or live retail availability. Check a seller’s current listing for the exact reference, price and stock before buying.
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
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