Seiko Presage SSA391 vs Seiko Presage SRPA25 Blue Dial Automatic
Specifications
Marked rows differ| Case | ||
| Case diameter | 42.4 mm | 42 mm |
|---|---|---|
| Thickness | 14.5 mm | 13 mm |
| Water resistance | 100 m | 100 m |
| Movement | ||
| Movement | Automatic, hand-winding capable | Automatic (self-winding, hand-windable, hacking) |
| Caliber | 4R37 | Seiko 4R35 |
| Details | ||
| Beat rate vph | — | 21600 |
| Bracelet | — | Stainless steel bracelet with deployment clasp |
| Case material | — | Stainless steel |
| Caseback | — | Exhibition (see-through) caseback |
| Crystal | — | Hardlex mineral |
| Date | — | Date at 3 o'clock |
| Dial color | — | Blue, sunburst finish |
| Jewels | — | 23 |
| Lume | — | None (no luminous coating on dial or hands) |
| Power reserve hours | — | 41 |
Sources
Verified · 16 referencesEvery spec on this page was independently checked against the sources below before publishing.