The Seiko 1F20-0G90 is a watch model based on the 1F20 movement.
Parts List
| 120N16SR01 | crystal |
| 30MK2NE1 | crown |
| 0H1400N01 | case back gasket - case back gasket |
| 2CA035A0BDG | hand - minute hand |
| 82824620 | others - case ring |
| 0351807 | others - winding stem |
| 1CA025A0BNG | others - small hand (6h) |
| 1F200G9043 | others - case |
| 1F202A00XG15 | others - dial |
| 1F205 | others - machine code |
Caliber 1F20
