The Seiko 1F20-5J39 is a watch model based on the 1F20 movement.
Parts List
| REDN44JK01 | crystal |
| REDN44JK | crystal |
| 30MH2NA1 | crown |
| 0H1400B01 | case back gasket - case back gasket |
| 0H1400B0 | case back gasket |
| Z5417G | band |
| 2CE045L0BDG | others - minute hand |
| 0351807 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 1F201J80XG14 | others - dial |
| 1F205 | others - machine code |
| 1F205J39 | others - case back |
| 1F205J3925 | others - case |
| 82821560 | others - case ring |
| EZ0035B01 | others - crown and stem gasket |
| 04Y02DGM | others - minute hand |
| 1CE030L2BDG | others - hour hand |
| 04V02DGH | others - hour hand |
Caliber 1F20
