Comparison
Citizen Promaster Air vs Seiko SPB451J1
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 mm across.
- Citizen Promaster Air has a titanium case; Seiko SPB451J1 is in stainless steel.
| Spec | Promaster Air | SPB451J1 |
|---|---|---|
| Brand | Citizen | Seiko |
| Family | Promaster | Prospex |
| Reference | Promaster Air | SPB451J1 |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | Current | Current |
| Retail price | unknown | unknown |
| Case material | Titanium | Stainless steel |
| Diameter | 40 mm | 40 mm |
| Movement | Automatic | Automatic |
| Caliber | unknown | unknown |