The Seiko 5E21-7A40 is a watch model based on the 5E21 movement.
Parts List
| 280A54JR02 | crystal - crystal |
| 6M40A0NMG1 | crown - crown |
| 6M40A0NMW1 | crown - crown |
| 0F250NA1S | case back gasket |
| EA78BG | band - band |
| EA80AG | band - band |
| 1BG080L0BDS | others - hour hand |
| 2BG115L0BDG | others - minute hand |
| 2BG115L0BDS | others - minute hand |
| 3BA125F1BNG | others - second hand |
| 3BA125F1BNS | others - second hand |
| 1BG080L0BDG | others - hour hand |
| 0351624 | others - winding stem |
| 5E217A4075 | others - case |
| 82836300 | others - case ring |
| 5E217A40 | others - case back |
| 5E217A4079 | others - case |
| 5E213 | others - machine code |
| 5E217A30XS14 | others - dial |
| 5E217A30XS23 | others - dial |
| A170BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |