The Seiko 1F20-5H50 is a watch model based on the 1F20 movement.
Parts List
| K04N40JN01 | crystal |
| K04N40JN | crystal |
| 30M98NA1 | crown |
| 0H1300B01 | case back gasket |
| 0H1300B0 | case back gasket |
| B5642G | band |
| B5642G-LKG | band - link |
| B5642G-PB1 | clasp - parts for buckle/clasp |
| B5642G-BK4G | clasp - clasp |
| 2CE045L0BDG | others - minute hand |
| 0351807 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 1F201H90XB14 | others - dial |
| 1F201H90XG14 | others - dial |
| 1F205 | others - machine code |
| 1F205H50 | others - case back |
| 1F205H5025 | others - case |
| 82823680 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
| 04Y02DGM | others - minute hand |
| 1CE030L2BDG | others - hour hand |
| 04V02DGH | others - hour hand |
Caliber 1F20
