The Seiko 1F21-0J80 is a watch model based on the 1F21 movement.
Parts List
| 180A02SN02 | crystal - crystal (sapphire) |
| 30MA2NA1 | crown - crown |
| 30MA2NB1 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| D0N2CG | band - band |
| DAN4BW | band - band |
| DAN5BW | band - band |
| D0N2CG-LK00 | band - link |
| D0N2CG-BK00 | clasp - clasp |
| 2BF070A0BNG | others - minute hand |
| 1BF050A2BNG | others - hour hand |
| 3BA075F1BNG | others - second hand |
| A110BS | others - push pin (for mb) |
| 1F211D60X914 | others - dial |
| 1F211D70XS14 | others - dial |
| 1F215 | others - machine code |
| D0N2CG-BKPP | others - spring bar for buckle/clasp |
| 0351807 | others - winding stem |
| 1BH050A0BNG | others - hour hand |
| 82822840 | others - case ring |
| 1F210J807HA | others - case |
| 1F210J807HB | others - case |
| 1F210J807H | others - case |
| 1F210J80 | others - case back |
| EZ0035B01 | others - crown and stem gasket |
| 2BH070A0BNG | others - minute hand |