The Seiko 7121-0010 is a watch model based on the 7121 movement.
Parts List
| 340N09KN00 | crystal |
| 45N21NC1 | crown |
| DA0070B01 | case back gasket - crown and stem gasket |
| DZ3400B01 | case back gasket |
Other models with the same movement
| 7121-7000 |
| 7121-7010 |
| 7121-701A |
| 7121-7020 |
| 7121-7030 |
| 7121-703A |
| 7121-703B |
| 7121-8000 |
| 7121-8010 |
| 7121-8020 |