The Seiko 1F21-5D70 is a watch model based on the 1F21 movement.
Parts List
| RE3A22SR01 | crystal - crystal |
| 6M30B3SNW0 | crown - crown |
| 0F200BA1S | case back gasket - case back gasket |
| D165AG-LK00 | band - link |
| D165AG | band - band |
| D166AG | band - band |
| 1BB035A1BAJ | others - hour hand |
| 1BH035A0BNS | others - hour hand |
| 2BB055A1BAJ | others - minute hand |
| 2BH055A0BNS | others - minute hand |
| 3BA075F0BAJ | others - second hand |
| 07SC06DS | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351807 | others - winding stem |
| S130BS | others - push pin |
| 82839720 | others - case ring |
| 1F215D7061 | others - case |
| 1F215D70 | others - case back |
| 1F215D7098 | others - case |
| 1F211J80XS24 | others - dial |
| 1F211J90XB13 | others - dial |
| 1F215 | others - machine code |