The Seiko Y789-4050 is a watch model based on the Y789 movement.
Parts List
| ES5W80GM01 | crystal |
| 0Z2950B0A | case back gasket |
| EA0091B0A | case back gasket |
| 86568681 | crystal gasket |
| 80615100 | pusher |
| AL87B | band - leather band |
| A180CS | others - push pin |
The Seiko Y789-4050 is a watch model based on the Y789 movement.
| ES5W80GM01 | crystal |
| 0Z2950B0A | case back gasket |
| EA0091B0A | case back gasket |
| 86568681 | crystal gasket |
| 80615100 | pusher |
| AL87B | band - leather band |
| A180CS | others - push pin |