Comparison
Casio EFS-S660D vs Citizen FD0004-51D
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 a solar movement.
- Casio EFS-S660D is 1.3 mm larger (38.3 mm vs 37 mm).
- Both cases are stainless steel.
| Spec | EFS-S660D | FD0004-51D |
|---|---|---|
| Brand | Casio | Citizen |
| Family | Edifice | Calendrier |
| Reference | EFS-S660D | FD0004-51D |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | Current | Current |
| Retail price | unknown | unknown |
| Case material | Stainless steel | Stainless steel |
| Diameter | 38.3 mm | 37 mm |
| Casio EFS-S660D is 1.3 mm larger | ||
| Movement | Solar | Solar |
| Caliber | Casio 5334 | unknown |
| Winding | unknown | unknown |
| Power reserve | unknown | unknown |
| Jewels | unknown | unknown |
| Frequency | unknown | unknown |
| Complications | unknown | unknown |