The Seiko 1F21-0A50 is a watch model based on the 1F21 movement.
Parts List
| 145W04HR01 | crystal |
| 38M18NA1 | crown |
| 0A1500B0A | case back gasket |
| 86581300 | crystal gasket |
| DB49A | band - metal band |
| DB50A | band - metal band |
| 07SC02NG | others - second hand |
| 0351807 | others - winding stem |
| 05T24NGH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 82813760 | others - case ring |
| 1F210A50 | others - case back |
| 1F210A50SA | others - case |
| 1F210B30XS14 | others - dial |
| 1F210B40XS14 | others - dial |
| 1F219 | others - machine code |
| 06T22NAM | others - minute hand |
| EA0040B0A | others - crown and stem gasket |