The Seiko 1F20-0090 is a watch model based on the 1F20 movement.
Parts List
| 175P15S20A | crystal |
| 25M69DA1 | crown |
| 0F120BAA3 | case back gasket |
| 0F140BAA3 | case back gasket - case back gasket |
| 86567330 | crystal gasket - plastic gasket for crystal |
| B5750 | band - metal band |
| 81613571 | band - other |
| 82282535 | others - bezel |
| 81181859 | others - bracelet fixing pipe |
| 82833850 | others - case ring |
| 81605955 | others - bracelet fixing pin |
| 1F200090 | others - case back |
| 1F200090PS | others - case |
| 1F200220XN24 | others - dial |
| 1F205 | others - machine code |
| 81506191 | others - screw |
| 1CA052A3BNG | others - hour hand |
| 0351807 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 2CA075A1BDG | others - minute hand |
Caliber 1F20
