The Seiko 1F20-5A80 is a watch model based on the 1F20 movement.
Parts List
| RECN34JN01 | crystal |
| RECN34JN | crystal |
| 30M36NA3 | crown - crown |
| 0H1400B01 | case back gasket - case back gasket |
| 0H1400B0 | case back gasket |
| Z5306G | band |
| Z5306G-BK3G | clasp - clasp |
| Z5306G-EP2 | others - endpiece |
| 82812160 | others - case ring |
| 1F200B30XG14 | others - dial |
| 1F200B70XB14 | others - dial |
| 1F205A80 | others - case back |
| 1F205A802N | others - case |
| 1F209 | others - machine code |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 03Y06DGM | others - minute hand |
| 03Y06DGH | others - hour hand |
Caliber 1F20
