The Seiko 2320-5490 is a watch model based on the 2320 movement.
Parts List
| ES1N12GM01 | crystal |
| ES1N12GM02 | crystal |
| 30N06NA1 | crown |
| 0A1800N01 | case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
Caliber 2320
Seiko 2320-5490 Watch Guide
The Seiko 2320-5490 is a watch model based on the 2320 movement.
| ES1N12GM01 | crystal |
| ES1N12GM02 | crystal |
| 30N06NA1 | crown |
| 0A1800N01 | case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |