The Seiko 1F20-5F10 is a watch model based on the 1F20 movement.
Parts List
| ESLN16JK01 | crystal |
| 30M66NA1 | crown |
| 30M66NS1 | crown |
| 0H1500B01 | case back gasket - case back gasket |
| MK10E | band - leather band |
| MK11E | band - leather band |
| T070AS | others - push pin |
| 1F201A70XN13 | others - dial |
| 1F201A70XS14 | others - dial |
| 1F205F10 | others - case back |
| 1F205F1025 | others - case |
| 1F205F102E | others - case |
| 1F209 | others - machine code |
| 82821220 | others - case ring |
| 0351807 | others - winding stem |
| 05Y36CGH | others - hour hand |
| 05Y36CGM | others - minute hand |
| 05Y36CSH | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 05Y36CSM | others - minute hand |
Caliber 1F20
