The Seiko 1F20-5C1A is a watch model based on the 1F20 movement.
Parts List
| RECN40JN01 | crystal |
| RECN40JN | crystal |
| 30M98NA1 | crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1500B0 | case back gasket |
| M5080T | band |
| M5080T-BK3G | clasp - clasp |
| 82814280 | others - case ring |
| 1F200D80XG14 | others - dial |
| 1F205C1A | others - case back |
| 1F205C1A25 | others - case |
| 1F209 | others - machine code |
| A100AS | others - push pin |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 04Y08NGM | others - minute hand |
| 04Y08NGH | others - small hand (6h) |
Caliber 1F20
