The Seiko 1F20-5C80 is a watch model based on the 1F20 movement.
Parts List
| K04N20JN01 | crystal |
| K04N20JN | crystal |
| 30M98NA1 | crown |
| 0H1200B01 | case back gasket |
| 0H1200B0 | case back gasket |
| Q5030G = NL | band |
| Q5030G | band - metal band |
| Q5030G-LKG | band - link |
| kein Ersatz | band |
| Q5030G-BK4G | clasp - clasp |
| Q5030G-EPG | others - endpiece |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 1F200G50XB14 | others - dial |
| 1F200G50XG14 | others - dial |
| 1F205C80 | others - case back |
| 1F205C8025 | others - case |
| 1F209 | others - machine code |
| 82812880 | others - case ring |
| 03Y12DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 03Y12DGH | others - hour hand |
| K04N20JN01 | crystal |
| K04N20JN | crystal |
| 30M98NA1 | crown |
| 0H1200B01 | case back gasket |
| 0H1200B0 | case back gasket |
| Q5030G = NL | band |
| Q5030G | band - metal band |
| Q5030G-LKG | band - link |
| kein Ersatz | band |
| Q5030G-BK4G | clasp - clasp |
| Q5030G-EPG | others - endpiece |
| 0351807 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 1F200G50XB14 | others - dial |
| 1F200G50XG14 | others - dial |
| 1F205C80 | others - case back |
| 1F205C8025 | others - case |
| 1F209 | others - machine code |
| 82812880 | others - case ring |
| 03Y12DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 03Y12DGH | others - hour hand |
Caliber 1F20
