The Seiko 1F20-5180 is a watch model based on the 1F20 movement.
Parts List
| K02A09SN01 | crystal - crystal |
| 25M44NA4 | crown |
| 25M44NA5 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| 89920155 | band - other |
| DB38BB | band - band |
| DB39BB | band - leather band |
| 1CA042A1BNG | others - hour hand |
| 1CG040LABDJ | others - hour hand |
| 2CA062A1BNG | others - minute hand |
| 2CG060LABDJ | others - minute hand |
| 0351807 | others - winding stem |
| 1F200450XS14 | others - dial |
| 1F205 | others - machine code |
| 1F20518043B | others - case |
| 82873310 | others - case ring |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1F20
