Seiko 4420 movement
| Type: | Manual |
| Sub-brand: | Grand Seiko,King Seiko |
| GMT/world time? | No |
| Chronograph? | No |
| Rate: | 18000 bph |
| Number of jewels: | 27 |
| Development division: | Daini (Kameido, Tokyo) |
Articles (repairs, services & mods)
- Parallel Universe: The King Seiko 4420-9990 Chronometer [adventuresinamateurwatchfettling.com]
- Grand Seiko Collector’s Guide [thespringbar.com]
