The Seiko 6139-8020 is a watch model based on the 6139 movement.
Parts List
| 310T28AN | crystal |
| 40M16N | crown |
| FH2980B | case back gasket |
| 80610160 | pusher |
| DJ0060B | others - crown gasket |
Caliber 6139
Seiko 6139-8020 Watch Guide
The Seiko 6139-8020 is a watch model based on the 6139 movement.
| 310T28AN | crystal |
| 40M16N | crown |
| FH2980B | case back gasket |
| 80610160 | pusher |
| DJ0060B | others - crown gasket |