The Seiko 7321-5580 is a watch model based on the 7321 movement.
Parts List
| SACN08GN00 | crystal - crystal |
| 30M54NA1 | crown |
| 30M54NS1 | crown - crown |
| 0H2100N01 | case back gasket - case back gasket |
| DK48B | band - band |
| DK46B | band - band |
| 07SC02NG | others - second hand |
| A130AS | others - push pin (for lb) |
| 73211021XS19 | others - dial |
| 73211031XS19 | others - dial |
| 73211620XS19 | others - dial |
| 73219 | others - machine code |
| 7321558025 | others - case |
| 82731000 | others - case ring |
| 732155802E | others - case |
| 0354735 | others - winding stem |
| 08SC14NS | others - second hand |
| DZ0041B01 | others - crown and stem gasket |
| 08TA0A1H | others - hour hand |
| 08TA0A1M | others - minute hand |
| 08TA0ASH | others - hour hand |
| 08TA0ASM | others - minute hand |