The Seiko 5S21-7A00 is a watch model based on the 5S21 movement.
Parts List
| 285W32SN01 | crystal |
| 35MA0NA3 | crown - crown |
| 0A2600N01 | case back gasket - case back gasket |
| AK42C | band - band |
| 10T98AGH | others - hour hand |
| 10T98AGM | others - minute hand |
| 12ST08HE | others - second hand |
| 82814660 | others - case ring |
| 5S217A00 | others - case back |
| 5S217A00XS14 | others - dial |
| 5S217A30XS14 | others - dial |
| 5S219 | others - machine code |
| A170BS | others - push pin |
| 82803220 | others - case ring |
| 5S217A0075 | others - case |
| 0351683 | others - winding stem |
Caliber 5S21
