The Seiko 2P20-521A is a watch model based on the 2P20 movement.
Parts List
| REEN21HR01 | crystal |
| 30NA9NG1 | crown |
| 0F200BA11 | case back gasket |
| ZLZ03E | band - leather band |
| ZLZ03E-LB | band - leather without buckle |
| ZLZ03E-BK8G | clasp - clasp |
| 07Y03DGH | hand - hour hand |
| 07Y13DGM | hand - minute hand |
| 2P200350XB14 | others - dial |
| 2P20521AK7 | others - case |
| 82733190 | others - case ring |
| A150BS | others - push pin |
| DA007BA11 | others - crown and stem gasket |
Caliber 2P20
