The Seiko 5B21-0AF0 is a watch model based on the 5B21 movement.
Parts List
| DFL4AW | band - band |
| DFL5AW | band - leather band |
| DFR7AW | band - leather band |
| DFL4AW-BK00 | clasp - clasp |
| DFL5AW-BK00 | clasp - clasp |
| DFR7AW-BK00 | clasp - clasp |
| S180BS | others - push pin |
Other models with the same movement
| 5B21-0AA0 |
| 5B21-0AB0 |
| 5B21-0AC0 |
| 5B21-0AD0 |
| 5B21-0AE0 |