The Seiko 1F20-0A20 is a watch model based on the 1F20 movement.
Parts List
| 135N06JN01 | crystal |
| 135N06JN | crystal |
| 30M98NA1 | crown |
| 0H1300B01 | case back gasket |
| 0H1300B0 | case back gasket |
| Q5027C-LKG | band - link |
| Q5027D | band - metal band |
| Q5027G-LKG | band - link |
| Q5027C | band |
| Q5027G | band |
| Q5027C-BK4G | clasp - clasp |
| Q5027G-BK4G | clasp - clasp |
| Q5027G-EPG | others - endpiece |
| 0351807 | others - winding stem |
| Q5027C-EPG | others - endpiece |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82813320 | others - case ring |
| 1F200A20 | others - case back |
| 1F200A2025 | others - case |
| 1F200A202N | others - case |
| 1F200C50XB14 | others - dial |
| 1F200C50XG14 | others - dial |
| 1F200C60XS19 | others - dial |
| 1F209 | others - machine code |
| 05Y02FGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 2CA052A0BNG | others - minute hand |
| 05Y02NGM | others - minute hand |
| 05Y02FGH | others - hour hand |
| 1CA035A0BNG | others - (24 hour hand) |
| 05Y02NGH | others - hour hand |
Caliber 1F20
