The Seiko 5E21-6C40 is a watch model based on the 5E21 movement.
Parts List
| 260A08SZ0C | crystal |
| 30MJ6NA4 | crown - crown |
| 0F240NA1S | case back gasket - case back gasket |
| GB39B | band - metal band |
| 1BF080L0BDG | others - hour hand |
| 2BF115L0BDG | others - minute hand |
| 0351624 | others - winding stem |
| 12ST06DA | others - second hand |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82814640 | others - case ring |
| 5E215 | others - machine code |
| 5E216C20X914 | others - dial |
| 5E216C40 | others - case back |
| 5E216C407Z | others - case |
| 87020283 | others - back plate |
| EZ0035B01 | others - crown and stem gasket |