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Seiko Prospex Alpinist
$503Historical price (2021-10-25)Stock unknown
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Case
- Diameter
- 38mm
- Thickness
- 12.9mm
- Lug-to-lug
- 46mm
- Material
- Stainless Steel
- Water resistance
- 200m
Crystal & dial
- Crystal
- Sapphire
- Lume
- LumiBrite
Movement
- Caliber
- Seiko 6R35
- Type
- Automatic
- Power reserve
- 70h
- Complications
- Date
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.
Market
Historical price (2021-10-25)$503
eBay listings
- SEIKO Prospex Alpinist SBDC138 6R35-01B0 Automatic 37mm Green Dial Date Men'sPre-owned - Good · JP$600
- Rare SEIKO SBDC138 Prospex Automatic AlpinistPre-owned - Good · JP$760
- SEIKO Prospex Alpinist Mechanical SBDC138 Automatic Cal.6R35 GreenPre-owned - Excellent · JP$761
Lowest displayed prices first.
Matched listings from our latest checks; eBay may show additional results. We may earn a commission through these links at no extra cost to you.
Retail stock & market context
Seiko on the secondhand market
+10.1%
2026 so far · +5.3% to +16.9% · 103 matched watches
In line with the index
Year-by-year readings →Similar watches
Community
Owners widely praise the Seiko Prospex Alpinist for its excellent 38mm case size and versatile design, making it a capable everyday and business-casual watch. The dark green sunburst dial is a standout feature, described as dynamic and beautifully textured. Its character is further enhanced by the compass bezel and gold indices, and it is considered a great "GADA" (Go Anywhere, Do Anything) watch and a "strap monster" adaptable to various bands. One owner notes the gold tone is less convincing than solid gold alternatives. Overall, owners rate the Seiko Prospex Alpinist highly for its appealing design and wearability at the price point.
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