The Seiko Y666-5020 is a watch model based on the Y666 movement.
Parts List
| ES2W19LN00 | crystal |
| 0Z2930B01 | case back gasket |
| 80605139 | pusher |
| 80605910 | pusher |
| 80605959 | pusher |
| EG0060B01 | others - button gasket |
Other models with the same movement
| Y666-5000 |
| Y666-500B |
| Y666-5010 |
| Y666-5030 |