The Seiko 5E21-5C20 is a watch model based on the 5E21 movement.
Parts List
| RE1A16SR02 | crystal - crystal |
| 30MA2NS1 | crown - crown |
| 0F250NA1S | case back gasket |
| DAW3AW | band - band |
| 3BA090F1BNS | others - second hand |
| 1BC050A1BAF | others - hour hand |
| 2BC080A1BAF | others - minute hand |
| 82836100 | others - case ring |
| 0351624 | others - winding stem |
| 5E215C207E | others - case |
| 5E215C20 | others - case back |
| 5E215 | others - machine code |
| 5E215C30XS19 | others - dial |
| 87020283 | others - back plate |
| A170BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |