The Seiko 1F20-5B80 is a watch model based on the 1F20 movement.
Parts List
| RECN28JN01 | crystal |
| RECN28JN | crystal |
| 30M98NA1 | crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1500B0 | case back gasket |
| B5532G | band |
| B5532G-LKG | band - link |
| B5567G | band |
| B5567K | band |
| B5567G-BK3G | clasp - clasp |
| B5567K-BK3G | clasp - clasp |
| B5532G-BK4G | clasp - clasp |
| 0351807 | others - winding stem |
| 1F200D60XS14 | others - dial |
| 1F200D70X919 | others - dial |
| 1F200E50XB14 | others - dial |
| 1F200E50XG14 | others - dial |
| 1F200E50XG34 | others - dial |
| 1F200E58XG34 | others - dial |
| 1F200G08XB19 | others - dial |
| 1F200G08XS19 | others - dial |
| 1F200K38XB14 | others - dial |
| 1F200K38XG14 | others - dial |
| 1F205B80 | others - case back |
| 1F205B8025 | others - case |
| 1F205B8025Z | others - case |
| 1F209 | others - machine code |
| 82812900 | others - case ring |
| A100AS | others - push pin |
| DZ0041B01 | others - crown and stem gasket |
| 03Y04NGM | others - minute hand |
| 03Y06DGM | others - minute hand |
| 03Y06DGH | others - hour hand |
| 03Y04FGM | others - minute hand |
| 03Y02NGH | others - hour hand |
| 04Y20AGM | others - minute hand |
| 03Y02FGH | others - hour hand |
| 04Y20AGH | others - hour hand |
| 03Y10NAH | others - hour hand |
Caliber 1F20
