The Seiko 1F20-0C90 is a watch model based on the 1F20 movement.
Parts List
| 120N06JN01 | crystal |
| 120N06JN | crystal |
| 30M98NA1 | crown |
| 0H1300B01 | case back gasket |
| 0H1300B0 | case back gasket |
| Z5371G | band |
| Z5371K | band |
| Z5371G-BK4G | clasp - clasp |
| Z5371G-PB1 | clasp - parts for buckle/clasp |
| Z5371K-BK4G | clasp - clasp |
| Z5371K-PB2 | clasp - parts for buckle/clasp |
| 0351807 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82813320 | others - case ring |
| 81603979 | others - bracelet fixing pin |
| 1F200C90 | others - case back |
| 1F200C9025 | others - case |
| 1F200C9025Z | others - case |
| 1F201C70XB14 | others - dial |
| 1F201C70XG14 | others - dial |
| 1F201C78XB14 | others - dial |
| 1F201C78XG14 | others - dial |
| 1F201C80XS19 | others - dial |
| 1F201C88XS19 | others - dial |
| 1F209 | others - machine code |
| 2CE042L0BDG | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 04Y06FGM | others - minute hand |
| 04Y12DGM | others - minute hand |
| 1CE030L4BDG | others - hour hand |
| 04Y06FGH | others - hour hand |
| 04Y12DGH | others - hour hand |
Caliber 1F20
