The Seiko 7321-507A is a watch model based on the 7321 movement.
Parts List
| ES4W70GN00 | crystal |
| 30M56NA1 | crown - crown |
| 0H1720N01 | case back gasket - case back gasket |
| 86567201 | crystal gasket - plastic gasket for crystal |
| ML32A | band - band |
| 07SC02NG | others - second hand |
| 07T04DGM | others - minute hand |
| A110AS | others - push pin |
| 0354735 | others - winding stem |
| 82711260 | others - case ring |
| 73210150XB14 | others - dial |
| 7321507A75 | others - case |
| 73219 | others - machine code |
| EZ0035B0A | others - crown and stem gasket |
| EZ0035B01 | others - crown and stem gasket |
| 07T04N1H | others - hour hand |