The Seiko 1F20-5C30 is a watch model based on the 1F20 movement.
Parts List
| RECN28JN01 | crystal |
| RECN28JN | crystal |
| 30M36NA3 | crown - crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1500B0 | case back gasket |
| B5548G | band |
| B5548G-BK3G | clasp - clasp |
| B5548G-EP2 | others - endpiece |
| 1F200E60XB14 | others - dial |
| 1F200E60XG14 | others - dial |
| 1F205C30 | others - case back |
| 1F205C302N | others - case |
| 1F209 | others - machine code |
| 82812900 | others - case ring |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 04Y18NGM | others - minute hand |
| 04Y08NGH | others - small hand (6h) |
Caliber 1F20
