The Seiko 5E21-5B80 is a watch model based on the 5E21 movement.
Parts List
| RE1A08SV0C | crystal |
| 30MA2NA1 | crown - crown |
| 0F240NA1S | case back gasket - case back gasket |
| D051CB | band - metal band |
| 3BA090F1BNG | others - second hand |
| 1BB060A1BNG | others - hour hand |
| 0351624 | others - winding stem |
| 5E215 | others - machine code |
| 5E215B80 | others - case back |
| 5E215B8079 | others - case |
| 5E215B90XL14 | others - dial |
| 5E215C00XS14 | others - dial |
| 82835320 | others - case ring |
| 87020283 | others - back plate |
| T090BS | others - push pin |
| 2BB080A1BNG | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |