The Seiko 1F20-0B40 is a watch model based on the 1F20 movement.
Parts List
| 170N02GN00 | crystal |
| 170N02GN | crystal |
| 170N51JN01 | crystal |
| 30M98NA1 | crown |
| 0H1800B01 | case back gasket - case back gasket |
| 0H1800B0 | case back gasket |
| Q5029C-LKG | band - link |
| Q5029D-LKG | band - link |
| Q5029G-LKG | band - link |
| Q5029C | band |
| Q5029G | band |
| Q5029D | band |
| Q5029G-BK4G | clasp - clasp |
| Q5029D-BK4G | clasp - clasp |
| Q5029C-BK4G | clasp - clasp |
| Q5029C-EPG | others - endpiece |
| Q5029D-EPG | others - endpiece |
| Q5029G-EPG | others - endpiece |
| 0351807 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82814520 | others - case ring |
| 1F200B40 | others - case back |
| 1F200B4025 | others - case |
| 1F200B402L | others - case |
| 1F200H40XG14 | others - dial |
| 1F200H50XS19 | others - dial |
| 1F200H60XS19 | others - dial |
| 1F200K80XS14 | others - dial |
| 1F209 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
| 07Y34NAM | others - minute hand |
| 07Y46NGM | others - minute hand |
| 07Y08DAM | others - minute hand |
| 07Y44NBH | others - hour hand |
| 07Y46NGH | others - hour hand |
| 07Y08DAH | others - hour hand |
Caliber 1F20
