The Seiko 1F21-1A00 is a watch model based on the 1F21 movement.
Parts List
| 190W42SN01 | crystal |
| 40MD2EH1 | crown |
| 0A1800B01 | case back gasket |
| ZK63A | band - leather band |
| 07SC02NS | others - second hand |
| 07SC02AB | others - second hand |
| 0351807 | others - winding stem |
| 82820520 | others - case ring |
| 1F210G50XS19 | others - dial |
| 1F211A00 | others - case back |
| 1F211A00RE | others - case |
| 1F211B00XS13 | others - dial |
| 1F219 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 07TF0NBH | others - hour hand |
| 07TF0NBM | others - minute hand |
| 07TE6CSH | others - hour hand |
| 07TE6CSM | others - minute hand |