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Seiko Ice Diver
$900Stock unknown
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Case
- Diameter
- 45mm
- Thickness
- 12.9mm
- Lug-to-lug
- 52.6mm
- Lug width
- 20mm
- Water resistance
- 200m
Crystal & dial
- Crystal
- Sapphire
- Lume
- LumiBrite
Movement
- Caliber
- Seiko 6R35
- Type
- Automatic
- Power reserve
- 70h
- Jewels
- 24
Seiko
Seiko's upgraded automatic caliber offering a substantial 70-hour power reserve, nearly double the 4R35 it replaces in higher-end Presage and Prospex models. The extended reserve is achieved through a longer mainspring while maintaining the same 21,600 vph beat rate. Accuracy is tightened to -15/+25 seconds per day compared to the 4R35's wider tolerance. Represents Seiko's push to compete with Swiss movements offering 80-hour reserves.
Design language
- Case shape
- round
- Dial style
- textured
- Bezel
- rotating
- Bracelet
- lug-attached
- Hands
- baton
AI-detected from the product image
Prospex Sea collection · 33 watches
20 more in this collection
Prospex Sea 1965 Heritage Diver's WatchProspex Sea 1965 Heritage Diver's Watch PADI Special EditionProspex Sea 1968 Heritage Diver's GMTProspex Sea 1968 Heritage Diver's GMT WatchProspex Sea 1968 Heritage Diver's GMT Watch Limited EditionProspex Sea 1970 Heritage Diver's Black Series Limited EditionProspex Sea 1970 Heritage Diver's Save the Ocean Special EditionProspex Sea JAWS 50th Anniversary Limited EditionProspex Sea PADI Special EditionProspex Sea PADI Special EditionProspex Sea PADI Special EditionProspex Sea PADI Special EditionProspex Sea Save the Ocean Special EditionProspex Sea Save the Ocean Special EditionProspex Sea Save the Ocean Special EditionProspex Sea Seiko Diver’s Watch 60th Anniversary Limited EditionProspex Sea Seiko Diver’s Watch 60th Anniversary Limited EditionProspex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited EditionProspex Sea The Black SeriesSumo
4 colorways
The living market
Asking prices & sales
Tracked on the secondary market, updated through the day. Not appraisals or offers.
Retail$900
2 for sale right now.
History only · Watch family · 49 weeks, Sep 28, 2020–Aug 24, 2026
- The weekly trend, on a real time scale
- All 2 listings, priced and linked
Seiko on the secondhand market
+7.9%
2026 so far · +3.2% to +12.7% · 75 matched watches
In line with the index
Divers as a group: +7.4% · 297 matched watches
Year-by-year readings →The connection engine
More like this.
The community take
Owners talk.
Owners widely praise the Seiko Prospex Sea for its robust build, classic dive watch design, and excellent value, with many highlighting its strong lume and comfortable wearability. Reviewers consistently flag its superior bezel action and overall finishing as standout features for its price point. Some owners find the 43mm case size substantial, with one noting it felt big, thick, and heavy on a 6.5-inch wrist, though others consider it a perfect size. The movement's power reserve is noted as less than newer variants by one reviewer. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and robust build at an accessible price.
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