Seiko has made dive watches since 1965. These are current Seiko divers ranked on published specs, split by budget so you can compare like with like.
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How we picked
Each watch earns points from published specs only: sapphire crystal (2), water resistance of 200 m or ISO 6425 diver certification (2; 100 m earns 1), screw-down crown (1), power reserve of 70 hours or more (1), display caseback (0.5), hacking plus hand-winding (0.5) and lug-to-lug of 47 mm or less (0.5). We rank by points, then by lower US list price. Near-identical colourways are grouped and we show the lowest-priced one. We cap each model family at two picks so the list isn't one watch in six colours.
The Seiko SRPE93 is a diver watch from the Prospex collection, part of the Sea family. It has a 45 mm stainless steel case, 13.4 mm thick. Inside is an automatic movement (calibre 4R36) with 41 h of power reserve. You also get 200 m water resistance, a hardlex (mineral) crystal and a silicone strap.
Good for: Wrists of roughly 18.1–20.0 cm (7.1–7.9 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving.
Why it's here
Certified to the ISO 6425 diver's standard (200 m)
Screw-down crown helps keep water out
Hacks and hand-winds, so it is easy to set
Trade-offs
Hardlex (mineral) crystal scratches more easily than sapphire
41 h power reserve: it stops after about a day and a half off the wrist
Full specs and fit checkCheck price on AmazonUS list price $525 (US list) (brand site, checked 29 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SRPE27 is a diver watch from the Prospex collection, part of the Sea family. It has a 42.4 mm stainless steel case, 13.4 mm thick, 49.4 mm from lug to lug. Inside is an automatic movement (calibre 4R36) with 41 h of power reserve. You also get 200 m water resistance, a hardlex (mineral) crystal and a bracelet.
Good for: Wrists of roughly 17.0–18.9 cm (6.7–7.4 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving.
Why it's here
Certified to the ISO 6425 diver's standard (200 m)
Screw-down crown helps keep water out
Hacks and hand-winds, so it is easy to set
Trade-offs
Hardlex (mineral) crystal scratches more easily than sapphire
41 h power reserve: it stops after about a day and a half off the wrist
Full specs and fit checkCheck price on AmazonUS list price $550 (US list) (brand site, checked 29 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SRPD55 is a diver watch from the Seiko 5 Sports collection. It has a 42.5 mm stainless steel case, 13.4 mm thick, 46 mm from lug to lug. Inside is an automatic movement (calibre 4R36) with 41 h of power reserve. You also get 100 m water resistance, a hardlex (mineral) crystal and a bracelet.
Good for: Wrists of roughly 17.0–18.9 cm (6.7–7.5 in), by our Watch Finder sizing guide; Everyday wear including swimming; People who enjoy seeing a mechanical movement at work.
Why it's here
Compact 46 mm lug-to-lug suits smaller wrists
Display caseback shows the movement
Hacks and hand-winds, so it is easy to set
Trade-offs
Hardlex (mineral) crystal scratches more easily than sapphire
41 h power reserve: it stops after about a day and a half off the wrist
Full specs and fit checkCheck price on AmazonUS list price $350 (US list) (brand site, checked 29 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SPB155 is a diver watch from the Prospex collection, part of the Seiko Baby Alpinist family. It has a 38 mm stainless steel case, 12.9 mm thick, 46 mm from lug to lug. Inside is an automatic movement (calibre 6R35) with 70 h of power reserve. You also get 200 m water resistance, a sapphire crystal and a bracelet.
Good for: Wrists of roughly 15.5–17.0 cm (6.1–6.7 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving; People who enjoy seeing a mechanical movement at work.
Why it's here
Sapphire crystal resists scratches
200 m water resistance
Screw-down crown helps keep water out
70 h power reserve survives a weekend off the wrist
Trade-offs
None stood out in the published specs
Full specs and fit checkCheck price on AmazonUS list price $725 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SPB249 is a diver watch from the Prospex collection, part of the Land family. It has a 38 mm stainless steel case, 12.9 mm thick, 46.2 mm from lug to lug. Inside is an automatic movement (calibre 6R35) with 70 h of power reserve. You also get 200 m water resistance, a sapphire crystal and a bracelet.
Good for: Wrists of roughly 15.6–17.0 cm (6.1–6.7 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving; People who enjoy seeing a mechanical movement at work.
Why it's here
Sapphire crystal resists scratches
200 m water resistance
Screw-down crown helps keep water out
70 h power reserve survives a weekend off the wrist
Full specs and fit checkCheck price on AmazonUS list price $750 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SPB210 is a diver watch from the Prospex collection, part of the Land family. It has a 39.5 mm stainless steel case, 13.2 mm thick, 46.4 mm from lug to lug. Inside is an automatic movement (calibre 6R35) with 70 h of power reserve. You also get 200 m water resistance, a sapphire crystal and a cow leather strap.
Good for: Wrists of roughly 15.7–17.7 cm (6.2–7.0 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving; People who enjoy seeing a mechanical movement at work.
Why it's here
Sapphire crystal resists scratches
200 m water resistance
Screw-down crown helps keep water out
70 h power reserve survives a weekend off the wrist
Trade-offs
Leather strap is less suited to water than a bracelet or rubber strap
Full specs and fit checkCheck price on AmazonUS list price $775 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SPB317 is a diver watch from the Prospex collection, part of the Sea family. It has a 41 mm stainless steel case, 12.3 mm thick, 46.9 mm from lug to lug. Inside is an automatic movement (calibre 6R35) with 70 h of power reserve. You also get 200 m water resistance, a sapphire crystal and a silicone strap.
Good for: Wrists of roughly 16.4–18.3 cm (6.4–7.2 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving.
Why it's here
Sapphire crystal resists scratches
Certified to the ISO 6425 diver's standard (200 m)
Screw-down crown helps keep water out
70 h power reserve survives a weekend off the wrist
Trade-offs
None stood out in the published specs
Full specs and fit checkCheck price on AmazonUS list price $900 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SPB501 is a diver watch from the Prospex collection, part of the Sea family. It has a 40 mm stainless steel case, 13 mm thick, 46.4 mm from lug to lug. Inside is an automatic movement (calibre 6R55) with 72 h of power reserve. You also get 300 m water resistance, a sapphire crystal and a bracelet.
Good for: Wrists of roughly 16.0–17.9 cm (6.3–7.0 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving.
Why it's here
Sapphire crystal resists scratches
Certified to the ISO 6425 diver's standard (300 m)
Screw-down crown helps keep water out
72 h power reserve survives a weekend off the wrist
Trade-offs
None stood out in the published specs
Full specs and fit checkCheck price on AmazonUS list price $1,650 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko SPB381 is a diver watch from the Prospex collection, part of the Sea family. It has a 42 mm stainless steel case, 12.9 mm thick, 48.6 mm from lug to lug. Inside is an automatic movement (calibre 6R54) with 72 h of power reserve. You also get 200 m water resistance, a sapphire crystal and a bracelet.
Good for: Wrists of roughly 16.8–18.7 cm (6.6–7.4 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving; Frequent travellers who track two time zones.
Why it's here
Sapphire crystal resists scratches
Certified to the ISO 6425 diver's standard (200 m)
Screw-down crown helps keep water out
72 h power reserve survives a weekend off the wrist
Trade-offs
None stood out in the published specs
Full specs and fit checkCheck price on AmazonUS list price $1,500 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
The Seiko HBF001 is a diver watch from the Prospex collection, part of the Marinemaster family. It has a 42.6 mm stainless steel case, 14.1 mm thick, 49.3 mm from lug to lug. Inside is an automatic movement (calibre 8L45) with 72 h of power reserve. You also get 300 m water resistance, a sapphire crystal and a bracelet.
Good for: Wrists of roughly 17.1–19.0 cm (6.7–7.5 in), by our Watch Finder sizing guide; Swimming, snorkelling and diving.
Why it's here
Sapphire crystal resists scratches
Certified to the ISO 6425 diver's standard (300 m)
Screw-down crown helps keep water out
72 h power reserve survives a weekend off the wrist
Trade-offs
Thick at 14.1 mm: harder to slide under a cuff
Full specs and fit checkCheck price on AmazonUS list price $3,600 (US list) (brand site, checked 23 Oct 2026). Amazon prices change often, so we don't show them here. Check the seller and warranty before you buy. Amazon links are paid links.
Questions
Which is the cheapest watch in this guide?
The Seiko SRPD55, at a US list price of $350 when we checked.
How did you choose these watches?
We ranked them on published specs only, using the scoring rules on this page. We haven't reviewed or worn these watches for this guide, and no brand or retailer paid to be included.
Which of these can I swim with?
Seiko SRPE93, Seiko SRPE27, Seiko SRPD55, Seiko SPB155, Seiko SPB249, Seiko SPB210 are rated to 100 m or more.
Do you earn money from these links?
Amazon links are paid links: as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Links to brand sites and eBay are not affiliate links.
