The Seiko 1F20-0C40 is a watch model based on the 1F20 movement.
Parts List
| 135N06JN01 | crystal |
| 135N06JN | crystal |
| 30MF6NA6 | crown |
| 0H1300B01 | case back gasket |
| 0H1300B0 | case back gasket |
| 81932041 | clasp - clasp |
| 82813320 | others - case ring |
| 1F200C40 | others - case back |
| 1F200C4025 | others - case |
| 1F201A10XB14 | others - dial |
| 1F209 | others - machine code |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 05Y24NGM | others - minute hand |
| 1CA035A0BNG | others - (24 hour hand) |
| 05Y02NGH | others - hour hand |
Caliber 1F20
