The Seiko 7320-5640 is a watch model based on the 7320 movement.
Parts List
| 25M04NS1 | crown |
| 25M04NA1 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0H1800N01 | case back gasket - case back gasket |
| NL | band |
Caliber 7320
Seiko 7320-5640 Watch Guide