The Seiko 7321-0720 is a watch model based on the 7321 movement.
Parts List
| 180W30SV01 | crystal - crystal |
| 35MF0NA1 | crown |
| 0A1700N0A | case back gasket |
| 0A1800N0A | case back gasket |
| 86580060 | crystal gasket - plastic gasket for crystal |
| HB64A | band - metal band |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 0354735 | others - winding stem |
| 82731680 | others - case ring |
| 73210720 | others - case back |
| 73210720SA | others - case |
| 73213150XS14 | others - dial |
| 73219 | others - machine code |
| 07SC06DG | others - second hand |
| EA0040B0A | others - crown and stem gasket |
| 07TE0DGM | others - minute hand |
| 07TE0DGH | others - hour hand |