Comparison
Seiko SPB143 vs Speake-Marin Infinity Date
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.
- Seiko SPB143 is 0.2 mm larger (40.5 mm vs 40.3 mm).
- Both cases are stainless steel.
| Spec | SPB143 | Infinity Date |
|---|---|---|
| Brand | Seiko | Speake-Marin |
| Family | Prospex | Infinity |
| Reference | SPB143 | Infinity Date |
| Nicknames | Baby Marinemaster, 62MAS reissue | unknown |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | Current | Current |
| Retail price | unknown | unknown |
| Case material | Stainless steel | Stainless steel |
| Diameter | 40.5 mm | 40.3 mm |
| Seiko SPB143 is 0.2 mm larger | ||
| Movement | Automatic | Automatic |
| Caliber | unknown | Speake-Marin SMA03-TD |
| Winding | unknown | Automatic |
| Power reserve | unknown | unknown |
| Jewels | unknown | 31 |
| Frequency | unknown | 28,800 vph |
| Complications | unknown | unknown |