The Seiko 2P21-0A50 is a watch model based on the 2P21 movement.
Parts List
| 210W16HK01 | crystal - crystal |
| 30MC0NA1 | crown - crown |
| 30MC0NS1 | crown - crown |
| 0A2000N01 | case back gasket |
| 86574680 | crystal gasket - plastic gasket for crystal |
| DA32A | band - band |
| DA33A | band - band |
| 09TB2DGH | others - hour hand |
| 09TB2DGM | others - minute hand |
| 09TB2DSH | others - hour hand |
| 09TB2DSM | others - minute hand |
| 08SC12NG | others - second hand |
| 08SC12NS | others - second hand |
| A130AS | others - push pin (for lb) |
| 2P210C60XG14 | others - dial |
| 2P210C70X999 | others - dial |
| 2P219 | others - machine code |
| 0351236 | others - winding stem |
| 2P210A5075 | others - case |
| 82801880 | others - case ring |
| 2P210A507E | others - case |
| EZ0035B01 | others - crown and stem gasket |
Caliber 2P21
