The Seiko 7321-510C is a watch model based on the 7321 movement.
Parts List
| SA5W62GN00 | crystal - crystal |
| 35M58NA1 | crown |
| 0A1900N01 | case back gasket - case back gasket |
| 86567360 | crystal gasket - plastic gasket |
| MK04B | band - band |
| 06T26AGH | others - hour hand |
| 06T26CGM | others - minute hand |
| 07SC02NG | others - second hand |
| 0354735 | others - winding stem |
| 82711420 | others - case ring |
| 73210250XG18 | others - dial |
| 7321510C | others - case back |
| 7321510C75 | others - case |
| 73219 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |