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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe Seiko Prospex SPB189J1 and SPB191J1 are two versions of the same titanium diver: the SPB189 pairs a black dial with a titanium bracelet, while the SPB191 has a white dial and silicone band. Both share a 43.5 mm case, Seiko’s 6R35 automatic movement and a stated 200 m diver’s water-resistance rating. “Shogun” is the familiar enthusiast nickname used in the 2020 hands-on coverage, not the official model name.
What separates the SPB189J1 and SPB191J1?
The practical choice is mainly about dial, supplied band and the feel of those bands on the wrist. Seiko’s product specifications list the SPB189J1 at 121.0 g and the SPB191J1 at 99.0 g. The lighter listed weight of the SPB191 comes with its silicone band; the SPB189’s figure is for its titanium bracelet configuration.
| Reference | Dial | Supplied band | Listed weight |
|---|---|---|---|
| SPB189J1 | Black | Titanium bracelet | 121.0 g (Seiko specification) |
| SPB191J1 | White | Silicone band | 99.0 g (Seiko specification) |
Choose the SPB189 if you want the black-dial look and a metal bracelet as supplied. The SPB191 is the natural fit if you prefer a white dial and flexible silicone band. The watches have the same published case dimensions and core specifications, so the choice is not between two different movements or case sizes.
How do they wear for watches this size?
Both have a 43.5 mm case diameter, 51.0 mm lug-to-lug length and 13.3 mm thickness, with 22 mm lug width. Those numbers describe a substantial watch on paper. In his November 25, 2020 hands-on article for Time+Tide, Thor Svaboe wrote that “What sticks in your mind after trying it on is how preconceived the very notion of size is.” That is his personal wear impression, not a measured fit result; wrist shape and band choice can change how a large case feels.
#1 Best Overall
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
The titanium construction and listed weights help explain why the watches may feel less burdensome than their dimensions suggest. The bracelet SPB189 is still the heavier of the pair by Seiko’s figures, while the silicone-band SPB191 is lighter. Neither weight alone establishes comfort for every wearer.
What do both watches have in common?
Movement and functions
Seiko specifies its 6R35 automatic movement, with manual winding, a date display and stop-second function. The stated power reserve is approximately 70 hours; the manufacturer’s stated precision is +25 to -15 seconds per day. These are published specifications, not results from independent timekeeping tests.
Rank #2
- STAINLESS STEEL CASE built to endure with style, making this watch your perfect daily companion
- AUTOMATIC MOVEMENT for seamless precision in every tick of this watch
- SCRATCH-RESISTANT CRYSTAL to maintain a pristine look even with daily wear and tear on your watch
- LUMINESCENT HANDS for effortless readability in low-light conditions, ensuring you never miss a moment with this watch
- WATER RESISTANT DESIGN ensuring your watch is ready for any adventure, rain or shine
Case, crystal and diver’s specification
Both models have a titanium case with super-hard coating and a titanium bezel. Seiko lists a sapphire crystal with magnifier and inner anti-reflective coating. Shared features include a unidirectional rotating bezel, screw-down crown, screw case back and LumiBrite on the hands, indices and bezel. Both are rated by Seiko for 200 m / 660 ft diver’s water resistance; that manufacturer rating should not be treated as a guarantee of suitability for every dive profile.
What was new about the 2020 Shogun versions?
The original “new Shogun” framing belongs to the watches’ launch period, not to 2026. Time+Tide’s November 2020 hands-on focused particularly on the changed dials; Svaboe summarized that shift by writing, “The biggest change here are the dials.” The review also gives favorable subjective impressions of the finishing, legibility and lightness. It does not establish controlled tests of timekeeping, durability or underwater performance.
Rank #3
- SEIKO WATCH – Seiko SRPL15 Prospex wristwatch.
- COLLECTION – Prospex design.
- CASE DESIGN – Prospex Mare model format.
- MODEL REFERENCE – SRPL15 identifies the specific model.
- WATCH DIAMETER – 41.7 mm.
Monochrome Watches reported retailer availability from November 2020 and launch prices of EUR 1,550 for the SPB189J1 and EUR 1,350 for the SPB191J1. These are historical euro launch figures, not current or universal prices. Seiko’s linked product pages currently display different regional listings: GBP 1,410 on the UK SPB189J1 page and USD 1,300 on the Middle East SPB191J1 page. Because they concern different references and markets, they are not a like-for-like price comparison; availability and local pricing should be checked with retailers in the buyer’s region.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which reference should you choose?
- Pick the SPB189J1 if you want a black dial and titanium bracelet straight from the box.
- Pick the SPB191J1 if you prefer a white dial, silicone band and lower manufacturer-listed weight.
- Compare local stock and price before buying: the historical launch prices and current regional product-page prices are not interchangeable.
For either model, the shared 22 mm lug width is useful when considering other bands, but it does not by itself confirm the fit of a particular aftermarket strap, clasp or end link.
Quick Recap
Best Value
- STUNNING BLUE DIAL: this rugged sports watch features a beautiful Manta Ray-patterned blue dial, with Lumibrite dial indicator hands and markers for low light and a magnified day/date calendar
- BLACK BEZEL: this versatile men’s watch features a black ceramic unidirectional bezel with distinctive scalloped edging, for elapsed timing
- AUTOMATIC & MANUAL: SRPF77 automatic watches for men power up with your natural movements, and feature the ability to wind manually, with 41 hours of reserve power
- WATER-RESISTANT: these rugged stainless steel dive watches for men feature a deep blue silicone strap and are both stylish and robust, following ISO standards for scuba, and are water-resistant to 200 meters
- 4R36 CALIBER: equipped with the reliable 4R36 caliber, these precise men’s wrist watches ensure the most accurate timekeeping
Rank #4
- AUTOMATIC MOVEMENT: Seiko 4R35 automatic movement includes manual winding, 23 jewels, date display, stop-second function, and approximately 41 hours of power reserve.
- 200M DIVER'S WATER RESISTANCE: Rated to 200 meters / 660 feet for diving, with a screw-down crown and screw case back.
- STAINLESS-STEEL CASE: 41.7mm stainless-steel case measures 12.3mm thick with a 49.5mm lug-to-lug distance and 20mm lug width.
- HARDLEX CRYSTAL: Durable Hardlex crystal protects the dial, while LumiBrite on the hands, indexes, and bezel improves low-light visibility.
- DIVER-READY DESIGN: Unidirectional rotating bezel and three-fold clasp with secure lock, push-button release, and extender provide practical functionality.
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.
