The Seiko 7321-5590 is a watch model based on the 7321 movement.
Parts List
| SACN04GM01 | crystal - crystal |
| 30M84NS1 | crown - crown |
| 0H2300B01 | case back gasket |
| AS04A | band - band |
| 0354735 | others - winding stem |
| 73215590HY | others - case |
| 82730840 | others - case ring |
| 73211040XS17 | others - dial |
| 73219 | others - machine code |
| A160AS | others - push pin |
| 08SC16AB | others - second hand |
| 08T02ASH | others - hour hand |
| 08T02ASM | others - minute hand |