The Seiko 1F20-5D20 is a watch model based on the 1F20 movement.
Parts List
| REDN04JN01 | crystal |
| REDN04JN | crystal |
| 30M98NA1 | crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1500B0 | case back gasket |
| Z5350G-LKG | band - link |
| Z5350G | band |
| Z5350K-LKG | band - link |
| Z5350K | band |
| Z5350K-BK4G | clasp - clasp |
| Z5350G-BK4G | clasp - clasp |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 1F200H00XB14 | others - dial |
| 1F200H00XG14 | others - dial |
| 1F200H78XB14 | others - dial |
| 1F200H78XG14 | others - dial |
| 1F205D20 | others - case back |
| 1F205D2025 | others - case |
| 1F205D2025Z | others - case |
| 1F209 | others - machine code |
| 82820320 | others - case ring |
| 04Y08NGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 04Y08NGH | others - small hand (6h) |
Caliber 1F20
