Comparison
Seiko 21407178 vs Seiko SPB377J1
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 belong to the Seiko Prospex family.
- Seiko 21407178 uses a solar movement; Seiko SPB377J1 uses an automatic one.
- Both cases are stainless steel.
| Spec | 21407178 | SPB377J1 |
|---|---|---|
| Brand | Seiko | Seiko |
| Family | Prospex | Prospex |
| Reference | 21407178 | SPB377J1 |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | unknown | Current |
| Retail price | unknown | unknown |
| Case material | Stainless steel | Stainless steel |
| Diameter | unknown | 39.5 mm |
| Movement | Solar | Automatic |
| Caliber | unknown | unknown |