The Seiko 8N20-5020 is a watch model based on the 8N20 movement.
Parts List
| ES3A51S20A | crystal - crystal |
| ES3A51S20B | crystal - crystal |
| 30MN5NS4 | crown - crown |
| 30MN5NSA | crown - crown |
| 0F240BA1S | case back gasket - case back gasket |
| WB06AW | band - band |
| W027AZ | band - band |
| W029AZ | band - band |
| WB08AW | band - band |
| 1BA060A1BNG | others - hour hand |
| 2BA095A1BDG | others - minute hand |
| 0351388 | others - winding stem |
| 8N20502061A | others - case |
| 82826590 | others - case ring |
| 8N205020WHA | others - case |
| 8N205020 | others - case back |
| DZ0040B01 | others - crown and stem gasket |
| 8N205020XL14 | others - dial |
| 8N205020XS14 | others - dial |
| 8N205020XS24 | others - dial |
| 8N205030XL14 | others - dial |
| 8N2063 | others - machine code |
| A120AS | others - push pin |
| 09T77DGH | others - hour hand |
| 09T77DGM | others - minute hand |
| 1BF065LABDG | others - hour hand |
| 2BF095LABDG | others - minute hand |
Caliber 8N20
Other models with the same movement
| 8N20-5000 |
| 8N20-5019 |
| 8N20-6000 |
| 8N20-6001 |
| 8N20-6010 |
| 8N20-6020 |
| 8N20-6030 |
| 8N20-603A |
| 8N20-6040 |
| 8N20-6070 |
| 8N20-6080 |
| 8N20-6099 |
| 8N20-6100 |
| 8N20-6110 |
| 8N20-6120 |
| 8N20-6130 |
| 8N20-6140 |
| 8N20-7000 |
| 8N20-700A |
| 8N20-8009 |