The Seiko 2Y20-0A5A is a watch model based on the 2Y20 movement.
Parts List
| 205N08JN01 | crystal |
| 30M98NA1 | crown |
| 0A1900B01 | case back gasket - gasket |
| ZL37A | band - band |
| 82800580 | others - case ring |
| 2Y000A5A25 | others - case |
| 2Y000A5A | others - case back |
| 2Y002D10XG14 | others - dial |
| 2Y009 | others - machine code |
| A110AS | others - push pin |
| 0351236 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 09Y04NAM | others - minute hand |
| 09Y04NAH | others - hour hand |