The Seiko 7321-0550 is a watch model based on the 7321 movement.
Parts List
| 180W46SN02 | crystal |
| 25M20NA3 | crown |
| 0A1700N01 | case back gasket - case back gasket |
| MK45E | band - leather band |
| 07SC06DG | others - second hand |
| 0354735 | others - winding stem |
| 82709680 | others - case ring |
| 73210550 | others - case back |
| 732105509F | others - case |
| 73212680XG14 | others - dial |
| 73219 | others - machine code |
| A110AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 07TH0CGH | others - hour hand |
| 07TH0CGM | others - minute hand |