The Seiko 1F20-0J4H is a watch model based on the 1F20 movement.
Parts List
| ESMN28SR03 | crystal |
| ESMN28SR | crystal |
| 30ML2NH1 | crown |
| 0H1400N01 | case back gasket - case back gasket |
| 0H1400N0 | case back gasket |
| 0D200NA12 | bezel gasket |
| ZJA59G | band |
| ZJA59G-BK1G | clasp - clasp |
| ZJA59G-EP3 | others - endpiece |
| 82821420 | others - case ring |
| 1F200J4H | others - case back |
| 1F200J4HBT | others - case |
| 1F202D10XN14 | others - dial |
| 1F205 | others - machine code |
| 81502461 | others - screw |
| 82320863 | others - bezel |
| 0351807 | others - winding stem |
| 2CG085L0BDG | others - minute hand |
| 08Y27DGM | others - minute hand |
| 1CG057L0BDG | others - hour hand |
| 08Y27DGH | others - hour hand |
Caliber 1F20
