The Seiko 7321-6600 is a watch model based on the 7321 movement.
Parts List
| ESDW02SN01 | crystal |
| 25M20NA3 | crown |
| 25M20NS3 | crown |
| 0A1800N01 | case back gasket |
| 86581980 | crystal gasket |
| 81923161 | clasp - clasp |
| 81923169 | clasp - clasp |
| 82810740 | others - case ring |
| 0354735 | others - winding stem |
| 73212690X915 | others - dial |
| 73213180X915 | others - dial |
| 73216600 | others - case back |
| 7321660061 | others - case |
| 7321660075 | others - case |
| 73219 | others - machine code |
| 06TB4DGH | others - hour hand |
| 05T44DGM | others - minute hand |
| 07SC06DG | others - second hand |
| 07SC06DS | others - second hand |
| 05T44DSM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |
| 06TB4DSH | others - hour hand |