The Seiko 8N20-6140 is a watch model based on the 8N20 movement.
Parts List
| 270Y03LV02 | crystal - crystal |
| 6M35B3NNG2 | crown - crown |
| 0H2400B01 | case back gasket - case back gasket |
| 86582550 | crystal gasket |
| 0H230BA91 | bezel gasket - bezel gasket |
| LK19E | band - band |
| 11T25JSM | others - minute hand |
| 0351388 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 82843630 | others - case ring |
| 8N20614025A | others - case |
| 8N206140 | others - case back |
| 8N206200XS14 | others - dial |
| A180BS | others - push pin |
Caliber 8N20
Other models with the same movement
| 8N20-5000 |
| 8N20-5019 |
| 8N20-5020 |
| 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 |
| 8N20-7000 |
| 8N20-700A |
| 8N20-8009 |