The Seiko 2320-5550 is a watch model based on the 2320 movement.
Parts List
| ES1N22GN00 | crystal - crystal |
| 30M06NA1 | crown - crown |
| 0G0055B01 | case back gasket - crown and stem gasket |
| 0A1800N01 | case back gasket |
| DZ33S | band - band |
| 0354811 | others - winding stem |
| 2320555025 | others - case |
| 83119060 | others - case ring |
| 232008701884 | others - dial |
| 232008708F74 | others - dial |
| 23201 | others - machine code |
| 07R02DGH | others - hour hand |
| 07R02DGM | others - minute hand |
Caliber 2320
