The Seiko 2P21-0A9B is a watch model based on the 2P21 movement.
Parts List
| 190W14SN02 | crystal - crystal |
| 30MA2NA1 | crown - crown |
| 0A1800N01 | case back gasket |
| 86570340 | crystal gasket |
| DL10B | band - band |
| 08SC14NG | others - second hand |
| 08T02AFH | others - hour hand |
| 08T02AFM | others - minute hand |
| 82801760 | others - case ring |
| 0351236 | others - winding stem |
| 2P210A9B75 | others - case |
| 2P210A9B | others - case back |
| 2P211A80XG14 | others - dial |
| 2P219 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
Caliber 2P21
