The Seiko 9550-5439 is a watch model based on the 9550 movement.
Parts List
| ES4W82SN00 | crystal |
| 25M12NA1 | crown |
| 25M12NS1 | crown |
| 0A2800N | case back gasket |
| EZ0035B0A | others - crown and stem gasket |
Caliber 9550
Seiko 9550-5439 Watch Guide
The Seiko 9550-5439 is a watch model based on the 9550 movement.
| ES4W82SN00 | crystal |
| 25M12NA1 | crown |
| 25M12NS1 | crown |
| 0A2800N | case back gasket |
| EZ0035B0A | others - crown and stem gasket |