Comparison
Casio GM-B2100SD vs Seiko SSH177J1
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 GM-B2100SD is 0.3 mm larger (44.4 mm vs 44.1 mm).
- Casio GM-B2100SD has a stainless steel case; Seiko SSH177J1 is in titanium.
| Spec | GM-B2100SD | SSH177J1 |
|---|---|---|
| Brand | Casio | Seiko |
| Family | G-Shock | Astron |
| Reference | GM-B2100SD | SSH177J1 |
| Production start | unknown | unknown |
| Production end | unknown | unknown |
| Status | Current | Current |
| Retail price | unknown | unknown |
| Case material | Stainless steel | Titanium |
| Diameter | 44.4 mm | 44.1 mm |
| Casio GM-B2100SD is 0.3 mm larger | ||
| Movement | Solar | Solar |
| Caliber | Casio 5691 | unknown |
| Winding | unknown | unknown |
| Power reserve | unknown | unknown |
| Jewels | unknown | unknown |
| Frequency | unknown | unknown |
| Complications | unknown | unknown |