The Seiko 2P21-0A30 is a watch model based on the 2P21 movement.
Parts List
| 210W12JN01 | crystal - crystal |
| 30MA2NA1 | crown - crown |
| 30MA2NS1 | crown - crown |
| 0A1900N01 | case back gasket - case back gasket |
| 0A1800N01 | case back gasket |
| 86564280 | crystal gasket - plastic gasket for crystal |
| ML24A | band - band |
| ML25A | band - band |
| 08SC12NG | others - second hand |
| 08SC12NS | others - second hand |
| 09T04A1H | others - hour hand |
| 09T04ASH | others - hour hand |
| 09T18AGM | others - minute hand |
| 09T18ASM | others - minute hand |
| 2P210A3075 | others - case |
| 82801820 | others - case ring |
| 0351236 | others - winding stem |
| 2P210A307E | others - case |
| 2P210C30XS19 | others - dial |
| 2P219 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 210W12JN01 | crystal - crystal |
| 30MA2NA1 | crown - crown |
| 30MA2NS1 | crown - crown |
| 0A1900N01 | case back gasket - case back gasket |
| 0A1800N01 | case back gasket |
| 86564280 | crystal gasket - plastic gasket for crystal |
| ML24A | band - band |
| ML25A | band - band |
| 08SC12NG | others - second hand |
| 08SC12NS | others - second hand |
| 09T04A1H | others - hour hand |
| 09T04ASH | others - hour hand |
| 09T18AGM | others - minute hand |
| 09T18ASM | others - minute hand |
| 2P210A3075 | others - case |
| 82801820 | others - case ring |
| 0351236 | others - winding stem |
| 2P210A307E | others - case |
| 2P210C30XS19 | others - dial |
| 2P219 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
Caliber 2P21
