The Seiko 1F20-5C4H is a watch model based on the 1F20 movement.
Parts List
| RECN48SN01 | crystal |
| RECN48SN | crystal |
| 25M28NA1 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| 0H1860N0 | case back gasket |
| BKJ32G | band |
| 1F202C10XG14 | others - dial |
| 1F205C4H | others - case back |
| 1F205C4H25 | others - case |
| 1F209 | others - machine code |
| 82814940 | others - case ring |
| A140AS | others - push pin |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 05Y13DGM | others - minute hand |
| 05Y13DGH | others - hour hand |
Caliber 1F20
