The Seiko 5E21-6D40 is a watch model based on the 5E21 movement.
Parts List
| 250A02SN02 | crystal |
| 30MJ6NA4 | crown - crown |
| 0F240NA1S | case back gasket - case back gasket |
| D015CZ | band - band |
| D015DZ | band - metal band |
| 1BF075A1BNG | others - hour hand |
| 3AA125FMANG | others - second hand |
| 2BF110A1BDG | others - minute hand |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82814640 | others - case ring |
| 5E216D40T8 | others - case |
| 5E216D40 | others - case back |
| 5E215 | others - machine code |
| 5E216D40T8A | others - case |
| 5E216D40XG14 | others - dial |
| 5E216D50XS14 | others - dial |
| 87020283 | others - back plate |
| 0351624 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 2BF105A1BDG | others - minute hand |