Seiko · Prospex
Alpinist
Ref. SPB121
current6R35 Prospex AlpinistDocumentedLast reviewed Not yet reviewed
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The Prospex-era Alpinist: slightly larger than the SARB017, with the longer-reserve 6R35 and Prospex branding on the dial.
At a glance
- Brand
- Seiko
- Collection
- Prospex
- Reference
- SPB121
- Production
- 2020–present
- Caliber
- 6R35
- Case diameter
- 39.5mm
- Case material
- Stainless steel
Related references
Reference family timeline
Every generation in this lineage in production order. Spans are as documented; an open end means the reference is current or its end year is not established.