The Seiko 1F20-5J0H is a watch model based on the 1F20 movement.
Parts List
| REDN18SN01 | crystal |
| REDN18SN | crystal |
| 32M04NA9 | crown |
| 0H1800B01 | case back gasket - case back gasket |
| 0H1800B0 | case back gasket |
| Z5431G | band |
| Z5431G-LKG | band - link |
| Z5431G-PB4 | clasp - parts for buckle/clasp |
| Z5431G-BK7G | clasp - clasp |
| 0351807 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 1F201J60XS19 | others - dial |
| 1F205 | others - machine code |
| 1F205J0H | others - case back |
| 1F205J0H26 | others - case |
| 82820360 | others - case ring |
| 86503366 | others - decorative plate |
| 86503386 | others - decorative plate |
| EZ0035B01 | others - crown and stem gasket |
| 2CE052L0BDA | others - minute hand |
| 1CE035L0BDA | others - hour hand |
Caliber 1F20
