Comparison
Grand Seiko SBGM245 vs Seiko SPB143
Sourced specs side by side. A value is highlighted only where one is objectively greater (power reserve); size and the rest are a matter of taste. unknown means no sourced value yet.
At a glance
- Both use an automatic movement.
- Both cases measure 40.5 mm across.
| Spec | SBGM245 | SPB143 |
|---|---|---|
| Brand | Grand Seiko | Seiko |
| Family | Collection | Prospex |
| Reference | SBGM245 | SPB143 |
| Nicknames | unknown | Baby Marinemaster, 62MAS reissue |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | Current | Current |
| Retail price | unknown | unknown |
| Case material | unknown | Stainless steel |
| Diameter | 40.5 mm | 40.5 mm |
| Movement | Automatic | Automatic |
| Caliber | Seiko 9S6 | unknown |
| Winding | Manual | unknown |
| Power reserve | 72 hours | unknown |
| Jewels | unknown | unknown |
| Frequency | unknown | unknown |
| Complications | unknown | unknown |