Seiko SPB525: caliber 6R55, 40.2 mm case, 100 m water resistance.
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Specifications
Specifications from Seiko, last seen 2026-09-21.
Movement
- Caliber
- 6R55 All 6R55 watches →
- Movement
- Automatic
- Power reserve
- 72h
- Jewels
- 24
Case & crystal
- Case material
- Stainless steel (super hard coating)
- Case diameter
- 40.2mm
- Case thickness
- 13mm
- Lug to lug
- 46mm
- Lug width
- 20mm
- Crystal
- Dual-curved sapphire crystal
Resistance
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
Catalogue
- Family
- SPB
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Variants Same watch, different market or bracelet
| Reference | Edition | Region | Band | Clasp | Weight |
|---|---|---|---|---|---|
| SPB525J1 | J1 | Japan | — | Three-fold clasp with push button release | — |