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What the SNR045 is
Seiko identifies the SNR045J1 as a Prospex LX model and lists it as a limited edition of 500 pieces. The official Singapore product page is the source for the specifications below; its displayed price is regional, not a worldwide quote or confirmation of local stock. Seiko’s official SNR045J1 page
| Specification | Seiko-listed detail |
|---|---|
| Movement | Caliber 5R65 Spring Drive; approximately 72 hours of power reserve; stated precision of ±15 seconds per month (±1 second per day); 30 jewels |
| Display | Date and power-reserve indicator |
| Case | Titanium with super-hard coating; 44.8 mm diameter, 50.9 mm lug-to-lug, 15.7 mm thick |
| Crystal | Curved inner-surface sapphire crystal with anti-reflective coating |
| Water resistance | 300 m / 1000 ft, rated for saturation diving |
| Other features | Unidirectional bezel; LumiBrite on hands, indices and bezel; screw case back with numbered limited-edition case back; 22 mm lug distance |
How it wears: a large, detailed case
At 44.8 mm across, 50.9 mm lug-to-lug and 15.7 mm thick, the SNR045 has dimensions worth considering before buying. In his September 2020 Fratello hands-on, Bert Buijsrogge describes it as larger than his preferred watches, but says it was an exception for his personal taste. That is one reviewer’s fit reaction, not a universal comfort verdict.
Buijsrogge also notes the contrast between polished and brushed case surfaces. Seiko’s official page identifies the case as titanium with a super-hard coating. Fratello’s specification table conflicts on this point, listing stainless steel; Seiko’s product page is the basis for the titanium identification here. Bert Buijsrogge’s Fratello hands-on, published September 16, 2020
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- 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 green dial and its design story
Buijsrogge describes the dial’s color and texture as inspired by Antarctic exploration and “kokebozu”—moss pillars at the bottom of a lake in Skarvsnes Foreland. This is the design account given in his review, rather than a specification on Seiko’s product page. The same article says the Prospex LX line was designed in collaboration with Ken Okuyama and relates the case design to Seiko’s historic 1968 diver.
The dial also carries a visible power-reserve indicator. Its presence is functional: Seiko specifies an approximately 72-hour reserve. Whether that indicator suits the dial is a matter of taste; Buijsrogge says it did not suit his preference.
Rank #2
- PADI SPECIAL EDITION: Men's Prospex Sea diver featuring a PADI Special Edition design with a stainless-steel case and ceramic bezel display.
- AUTOMATIC MOVEMENT: Seiko 4R36 automatic movement offers manual winding, 24 jewels, day/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.
- SAPPHIRE CRYSTAL: Sapphire crystal with magnifier and inner anti-reflective coating provides durable dial protection and improved readability.
- DIVER-READY FEATURES: 45mm stainless-steel case, unidirectional rotating bezel, LumiBrite hands, indexes and bezel, plus a secure three-fold clasp with extender.
Movement and diving capability
The 5R65 is a Spring Drive caliber, and Seiko states precision of ±15 seconds per month (±1 second per day) and approximately 72 hours of power reserve. These are manufacturer specifications, not independent measurements of this particular watch. The date and reserve indicator are the listed displays.
Seiko rates the watch to 300 m / 1000 ft for saturation diving and lists a unidirectional bezel, LumiBrite on the hands, indices and bezel, and a screw case back. The rating describes the model’s stated water-resistance category; it does not by itself establish suitability for every real-world diving setup.
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Rank #3
- 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
Price, availability and strap fit
Seiko’s Singapore page currently displays SGD 8,859.60. That figure applies to that regional listing only, and the available information does not establish current inventory in other locations. Fratello recorded €6,100 in 2020; that dated figure should not be treated as a current price. With only 500 pieces listed, production is limited, so check with a local retailer for current availability and pricing.
The official lug distance is 22 mm, which gives strap shoppers a starting width. Width alone does not guarantee a suitable replacement: check the actual fit at the lugs, as well as clasp compatibility and the seller’s claims.
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.
Who should consider the SNR045?
- It may appeal if you want a Spring Drive diver with a distinctive green textured dial, titanium construction and a stated 300 m saturation-diving rating.
- Think carefully if you prefer slimmer or smaller watches, or want a cleaner dial without a visible power-reserve indicator.
- Before committing compare its dimensions with a watch that fits you, and verify regional price and availability rather than relying on an old review price or another market’s listing.
Buijsrogge’s verdict was personal and positive: “This diver is definitely one of them.” That enthusiasm sits alongside his reservations about the size and reserve indicator, making the review useful as an account of one wearer’s experience rather than a universal fit recommendation.
Quick Recap
Best Value
- 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
- LUMIBRITE DISPLAY: this men's dive watch features a highly-legible display with LumiBrite hands and markers
- STAINLESS STEEL: features a durable stainless steel watch case and bracelet, unique case shape resembling teeth, and PADI red and blue colors on its elapsed timing bezel
- 4R36 CALIBER: equipped with the reliable caliber 4R36 automatic movement, this accurate men's watch keeps precise time
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.
