The Seiko 7321-5520 is a watch model based on the 7321 movement.
Parts List
| ESCN38SN00 | crystal |
| 30M62NA3 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| DK44B | band - leather band |
| 07SC06DG | others - second hand |
| 05T02NGM | others - minute hand |
| 0354735 | others - winding stem |
| 73210960XG14 | others - dial |
| 732155204F | others - case |
| 73219 | others - machine code |
| 82730720 | others - case ring |
| A110AS | others - push pin |
| 05T06NGH | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |