The Seiko 1F20-5E50 is a watch model based on the 1F20 movement.
Parts List
| K03N34JN01 | crystal |
| K03N34JN | crystal |
| 30M98NA1 | crown |
| 0H1300B01 | case back gasket |
| 0H1300B0 | case back gasket |
| 81932041 | clasp - clasp |
| 82821360 | others - case ring |
| 0351807 | others - winding stem |
| 1F201A20XS14 | others - dial |
| 1F205E50 | others - case back |
| 1F205E5025 | others - case |
| 1F209 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
| 04Y06FGM | others - minute hand |
| 04Y06FGH | others - hour hand |
Caliber 1F20
