Seiko
Alpinist SARB017
Ref. SARB017
2004–2019 · 38mm · caliber Seiko Cal. 6R15: in-house automatic, 21,600bph, 50h PR, 23j; Diashock shock protection, Diaflex mainspring; hackable and hand-winding
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Movement tier: unclassified
Also uses Seiko Cal. 6R15
Versatile size: fits most wrists (6–7.5 in / 15–19 cm)
38 mm case. The sweet spot for the broadest range of wrist sizes. Neither too dainty nor too bold.
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Authentication
SARB017 white dial is the most formal of the Alpinist trio; dial condition is critical as white dials show age and storage damage more visibly.
Known issues in the market
- White dial discoloration from UV exposure or moisture ingress.
- Service replacement with slightly off-white aftermarket dials.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | White dial uniformity | Clean white with no yellowing, even surface texture, sharp printing on all text and indices, lume plots bright and undamaged | Yellowing or cream discoloration especially toward the edges, lume plots that appear replaced or mismatched in color |
| hands | Cathedral hands and lume | Matching cathedral hands with lume fill consistent with the dial plot lume color | Lume aging that is dramatically different between hands and dial, suggesting mismatched parts |
| caseback | SARB017 engraving | SARB017 reference engraved, 4S15 caliber reference, standard Seiko caseback markings | Wrong reference, re-engraved text, caseback that does not thread cleanly (suggesting multiple openings) |
| crystal | Sapphire crystal flatness | Flat sapphire with no distortion, clean anti-reflective coating on underside, no chips at the chapter ring edge | Mineral crystal substitution, visible distortion indicating non-OEM replacement, chips or lifting at the edge |
Common legitimate replacements
- Straps are commonly replaced.
Expert resources: The white dial SARB017 is the rarest of the three and commands the highest prices in excellent condition. Insist on photos in natural light before purchasing.



