The Seiko 7439-5120 is a watch model based on the 7439 movement.
Parts List
| ESTN25JN00 | crystal |
| 30N69NA1 | crown |
| 30N69NS1 | crown |
| DZ0065B01 | case back gasket - button gasket |
| 0G2900B02 | case back gasket |
Caliber 7439
Seiko 7439-5120 Watch Guide
The Seiko 7439-5120 is a watch model based on the 7439 movement.
| ESTN25JN00 | crystal |
| 30N69NA1 | crown |
| 30N69NS1 | crown |
| DZ0065B01 | case back gasket - button gasket |
| 0G2900B02 | case back gasket |