The Seiko 3Y09-5A20 is a watch model based on the 3Y09 movement.
Parts List
| SABW18JN | crystal |
| SABW18JN01 | crystal |
| 30MB6NA1 | crown |
| 0A2000B01 | case back gasket |
| EZ0035B0 | case back gasket |
| G5137C | band - metal band |
| G5137C-LKG | band - link |
| G5137G-LKG | band - link |
| G5137G | band |
| G5137G-PB1 | clasp - parts for buckle/clasp |
| G5137C-PB1 | clasp - parts for buckle/clasp |
| G5137G-BK2G | clasp - clasp |
| G5137C-BK2S | clasp - clasp |
| 07TE4AGH | hand - hour hand |
| 07TE4AGM | hand - minute hand |
| 0801812 | others - date dial |
| 3Y090C40XS14 | others - dial |
| 3Y090C50XS14 | others - dial |
| 3Y095A20 | others - case back |
| 3Y095A2075 | others - case |
| 3Y095A207L | others - case |
| 3Y099 | others - machine code |
| 82820440 | others - case ring |
| A120AS | others - push pin |
| EZ0035B0A | others - crown and stem gasket |
| 0351546 | others - winding stem |
| 1BB047A0BAA | others - hour hand |
| EZ0035B01 | others - crown and stem gasket |
| 07TE4NGM | others - minute hand |
| 07TE4NGH | others - hour hand |