Seiko Prospex Alpinist Evolution Green SPB117/SPB117J1 (SPB117, SPB117J1). Current Prices, JDM Listings, Market Analysis
The Seiko Prospex Alpinist Evolution Green SPB117J1 carries forward one of Seiko's most historically grounded designs, the Alpinist lineage built around a compass bezel and field-ready legibility. It sits in the Prospex family as a modern interpretation rather than a strict reissue, which shapes both its collector appeal and its pricing behavior. Tonbo tracks this reference because the US and Japanese secondary markets price it differently, and that gap is worth monitoring. At a current US median of $584, the SPB117 occupies a well-defined position for buyers evaluating entry points on a proven Seiko sport reference.
Current US Market Value
Across 44 verified US transactions, the SPB117 price settles at a median of $584. The interquartile range runs from $538 at the 25th percentile to $624 at the 75th percentile, a spread of roughly $86 that indicates reasonably consistent demand without wild condition swings distorting the sample. Forty-four comps is a workable dataset for a reference at this price tier. The data carries a green verification flag, meaning these transactions cleared Tonbo's comp-quality review rather than being pulled raw from listing prices. That distinction matters because asking prices on any platform run higher than cleared transaction prices, and this figure reflects what buyers actually paid.
Active JDM Listings
The Japanese market is showing active inventory for this reference right now. Pricing across recent listings spans a wide band, from accessible Mercari prices near the equivalent of $600 USD to Yahoo Shopping listings that reach well above the US median, suggesting condition and seller type vary significantly. Buyers looking to buy SPB117 Japan should account for that spread carefully before assuming every JDM listing represents a deal.
- ¥95,800 on Mercari (May 24) , the lowest-priced active listing, worth scrutinizing for condition
- ¥183,530 on Yahoo Shopping (May 24) , near or above US market value once import costs are added
- ¥190,040 on Yahoo Shopping (May 24) , similar positioning, minimal arbitrage margin
- ¥314,500 on Yahoo Shopping (May 24) , premium pricing, likely new or near-new with box and papers
- ¥369,690 on Yahoo Shopping (May 24) , at the top of the active range, well above US secondary market
Recent Alert History
No strict or opportunity alerts have fired for the SPB117 in the past 90 days. That is an honest read of current conditions, not a gap in coverage. It means no JDM listing has cleared Tonbo's threshold filters for a meaningful price advantage relative to the verified US comp range during that window. The market has been quiet on actionable signals for this reference. That can change as new inventory appears, which is the core reason to have alerts set rather than checking manually.
Japan vs. US Price Gap
The SPB117J1 carries the J suffix that identifies it as a Japan domestic model, and that designation historically supported a modest price gap between Japanese retail channels and the US secondary market. What the current JP listing data shows, however, is that the higher-priced Yahoo Shopping listings have compressed or eliminated that gap once proxy fees, shipping, and import costs are factored in. The Mercari listing at ¥95,800 is the exception worth watching, though condition on lower-priced Mercari listings for this reference requires careful verification before committing.
The primary risk factor here is that this is a new-generation Alpinist rather than a vintage reference. Secondary market pricing for newer models tends to be less anchored than for discontinued pieces, meaning values can drift in either direction as supply and demand normalize over time. Comp thinness is not a concern at 44 transactions, but buyers should treat the current US median as a live figure rather than a fixed floor.
Get Real-Time Alerts for Seiko Prospex Alpinist Evolution Green SPB117/SPB117J1
If you want to be notified when a JDM listing for the SPB117 clears Tonbo's price filters, the alert system at tonbomarket.com/signals handles that automatically. You can also browse current cross-market opportunities across tracked Seiko references at tonbomarket.com/deals. For broader coverage of the JDM market without committing to a paid plan, the free newsletter at tonbomarket.com surfaces notable movements on a regular cadence. Pricing for full access is at tonbomarket.com/pricing.