The Seiko 7321-5990 is a watch model based on the 7321 movement.
Parts List
| ESEN46SV01 | crystal - crystal |
| ESEN46SV02 | crystal |
| 32M04NA4 | crown |
| 32M04NB4 | crown |
| 0H2395N01 | case back gasket |
| YK19B | band - leather band |
| YK20B | band - band |
| 73215990EB | others - case |
| 73211560XB14 | others - dial |
| 73211560XG14 | others - dial |
| 7321599000 | others - case |
| 73219 | others - machine code |
| A190BS | others - push pin |
| 08T10DGH | others - hour hand |
| 0354735 | others - winding stem |
| 82734480 | others - case ring |
| 08T10DGM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |
| 08SC22D1 | others - second hand |