The Seiko 2P20-0550 is a watch model based on the 2P20 movement.
Parts List
| 200NA5SK01 | crystal - crystal |
| 30MA1DXA | crown - crown |
| 30MA1DZA | crown - crown |
| 30MA3DZA | crown |
| 0G1890B02 | case back gasket - case back gasket |
| XI999 | band - band |
| 05Y05DSH | others - hour hand |
| 05Y05DSM | others - minute hand |
| 82822230 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 0351236 | others - winding stem |
| 05Y05DGH | others - hour hand |
| 2P2005501EA | others - case |
| 2P20055041B | others - case |
| 2P20055041A | others - case |
| 2P202100XA25 | others - dial |
| 2P202100XA35 | others - dial |
| 2P202120XA14 | others - dial |
| 2P207 | others - machine code |
| A110AS | others - push pin |
| 05Y05DGM | others - minute hand |
Caliber 2P20
