Seiko
SPB121J1
Prospex
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Seiko · Japan · Field
Alpinist
SPB121J1
The J-suffix Alpinist. Same watch as the export SPB121 in most listings.
- 39.5 mm
- steel
- 2020
- Prospex
The index
Asking prices
Monthly index through September 2026, scaled to the current median ask.
- USD 510
- USD 640
- USD 740
- 8
This snapshot
Individual asks
The snapshot is compiled in US dollars. The header switches the display to euro or Hong Kong dollars at a fixed rate. Confirm currency, tax, and shipping on the marketplace. Lugfolio does not sell the watch.
USD 510
USD
Good · 2020 · Singapore · Private · Box, no papers
View on Carousell SingaporeOpens live listings for this reference
USD 530
USD
Good · 2022 · Switzerland · Dealer · Papers, no box
View on Chrono24Opens this reference’s page
USD 590
USD
Very good · 2025 · Hong Kong · Dealer · Box and papers
View on Carousell Hong KongOpens live listings for this reference
USD 620
USD
Very good · 2023 · United States · Dealer · Box and papers
View on The 1916 CompanyOpens live listings for this reference
USD 640
USD
Excellent · 2022 · United Kingdom · Private · Box and papers
View on eBayOpens live listings for this reference
USD 650
USD
Excellent · 2023 · United States · Dealer · Box and papers
View on BezelOpens live listings for this reference
USD 730
USD
Unworn · 2025 · United Kingdom · Dealer · Box and papers
View on WatchfinderOpens live listings for this reference
USD 740
USD
Unworn · 2023 · Switzerland · Dealer · Box, no papers
View on ChronextOpens live listings for this reference
Chrono24 opens the reference page when the brand is known. Other desks open their live listings for Seiko SPB121J1.
Also on the desk