The Seiko 7321-5820 is a watch model based on the 7321 movement.
Parts List
| SA8W12HN01 | crystal - crystal |
| 35MC2N01 | crown - crown |
| 0A1900N0A | case back gasket |
| 86573400 | crystal gasket - plastic gasket for crystal |
| DA26A | band - band |
| DA27A | band - band |
| 07SC02NG | others - second hand |
| A120BS | others - push pin (for lb) |
| 73211370XB14 | others - dial |
| 73211370XN14 | others - dial |
| 73219 | others - machine code |
| 0354735 | others - winding stem |
| 7321582098 | others - case |
| 82733100 | others - case ring |
| 73215820XF | others - case |
| 05T18DGM | others - minute hand |
| 05T18DGH | others - hour hand |