The Seiko 6138-8021 is a watch model based on the 6138 movement.
Parts List
| 350T02ANSD | crystal |
| 350T02ANG0 | crystal - crystal |
| 55M24NS1 | crown |
| 55M24NA1 | crown |
| FH2980B01 | case back gasket - case back gasket |
| DJ0160B01 | others - pusher gasket |
Caliber 6138
Seiko 6138-8021 Watch Guide