The Seiko 1F21-0D00 is a watch model based on the 1F21 movement.
Parts List
| 200W22SN02 | crystal - crystal |
| 30MH4NA2 | crown |
| 30MH4NS2 | crown |
| 0A1800B01 | case back gasket |
| HK35C | band - leather band |
| HK36C | band - leather band |
| 10SC14AB | hand - second hand |
| 1F210D00 | others - case back |
| 1F210D0075 | others - case |
| 1F210D007E | others - case |
| 1F210E30XS19 | others - dial |
| 1F210E40X919 | others - dial |
| 1F210E50XS19 | others - dial |
| 1F219 | others - machine code |
| A120AS | others - push pin |
| 0351807 | others - winding stem |
| 82821060 | others - case ring |
| 08T24AGH | others - hour hand |
| 08T24FSH | others - hour hand |
| 08T24FSM | others - minute hand |
| 08T24AGM | others - minute hand |
| 08TK2CGH | others - hour hand |
| 08TK2CGM | others - minute hand |