The Seiko 6139-8021 is a watch model based on the 6139 movement.
Parts List
| 310TY28 | crystal |
| 310T28ANS0 | crystal |
| FH2980B01 | case back gasket - case back gasket |
| DJ0060B01 | others - crown gasket |
Caliber 6139
Seiko 6139-8021 Watch Guide
The Seiko 6139-8021 is a watch model based on the 6139 movement.
| 310TY28 | crystal |
| 310T28ANS0 | crystal |
| FH2980B01 | case back gasket - case back gasket |
| DJ0060B01 | others - crown gasket |