Comparison
Citizen Promaster Air vs Grand Seiko SBGR321
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.
| Spec | Promaster Air | SBGR321 |
|---|---|---|
| Brand | Citizen | Grand Seiko |
| Family | Promaster | Collection |
| Reference | Promaster Air | SBGR321 |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | Current | Current |
| Retail price | unknown | unknown |
| Case material | Titanium | unknown |
| Diameter | 40 mm | 40 mm |
| Movement | Automatic | Automatic |
| Caliber | unknown | unknown |