The Seiko 7321-5020 is a watch model based on the 7321 movement.
Parts List
| SA4W84GN00 | crystal - crystal |
| 25M18NS1 | crown - crown |
| 25M18NA1 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| 0A1800N01 | case back gasket |
| 86565580 | crystal gasket - plastic gasket for crystal |
| 86565581 | crystal gasket - plastic gasket for crystal |
| RB05A | band - band |
| RB04A | band - band |
| 07SC02NG | others - second hand |
| 06T32DGH | others - hour hand |
| EZ0035B0A | others - crown and stem gasket |
| 732150206Y | others - case |
| 82708660 | others - case ring |
| 73215020SP | others - case |
| 81181859 | others - bracelet fixing pipe |
| 81606479 | others - bracelet fixing pin |
| 0354735 | others - winding stem |
| 73210040XS14 | others - dial |
| 73210050X994 | others - dial |
| 73219 | others - machine code |
| 06T32DGM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |