The Seiko 2B20-5009 is a watch model based on the 2B20 movement.
Parts List
| SAFN27AN01 | crystal |
| 35NK3NA1 | crown |
| 0G1700B01 | case back gasket |
| 0G1750B01 | case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| BGA19G | band - leather band |
| BGJ07G | band - leather band |
| KGA01G | band - leather band |
| 1DE032LABNG | others - hour hand |
| 2DE050LABNG | others - minute hand |
| 05R09NGH | others - hour hand |
| 2B200020XG14 | others - dial |
| 2B200080XB14 | others - dial |
| 2B2027 | others - machine code |
| 2B205000 | others - case back |
| 2B20500925 | others - case |
| 82803130 | others - case ring |
| A110AS | others - push pin |
| 05R11DGM | others - minute hand |
| 05R11DGH | others - hour hand |
| 05R09NGM | others - minute hand |
Caliber 2B20
Other models with the same movement
| 2B20-5000 |
| 2B20-5010 |
| 2B20-5019 |
| 2B20-5020 |
| 2B20-5039 |
| 2B20-5049 |
| 2B20-5059 |