1968
World's First Quartz Wall Clock
The world’s first quartz wall clock with the spiral crystal resonator, an original Seiko technology.
| Name | World's First Quartz Wall Clock |
|---|---|
| Time/Period | 1968 |
1968
The world’s first quartz wall clock with the spiral crystal resonator, an original Seiko technology.
| Name | World's First Quartz Wall Clock |
|---|---|
| Time/Period | 1968 |
